A330-200/300 Flight Controls Training Manual PDF

A330-200/300 DIFFERENCES FROM A318/A319/A320/A321 (CFM56/V2500) TRAINING MANUAL FLIGHT CONTROLS THIS MANUAL IS FOR TRAINING PURPOSES ONLY AND SHOULD NOT BE USED FOR ANY OTHER PURPOSE THE...

A330-200/300 DIFFERENCES FROM A318/A319/A320/A321 (CFM56/V2500) TRAINING MANUAL FLIGHT CONTROLS THIS MANUAL IS FOR TRAINING PURPOSES ONLY AND SHOULD NOT BE USED FOR ANY OTHER PURPOSE THESE NOTES ARE NOT UPDATED B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS Flight Controls Line Maintenance Briefing (2).................. 2 ELECTRICAL FLIGHT CONTROL SYSTEM Roll D/O (3)............................................ 34 Pitch D/O (Elevator) (3)................................... 44 Pitch D/O (THSA) (3).................................... 56 Yaw D/O (3)............................................ 66 Primary CTL Speed Brake & Lift Dumping D/O (3)............. 82 SLATS AND FLAPS Secondary CTL Slat & Flap Transmission D/O (3).............. 96 Secondary CTL Slat & Flap NORM Operation D/O (3)......... 130 Secondary CTL Slat & Flap ABNORM OPER D/O (3)......... 152 Secondary Control Laws D/O (3)........................... 172 MAINTENANCE PRACTICE Flight Controls System Base Maintenance (3)................. 180 G7508471 - G7UT0TU CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) TABLE OF CONTENTS Nov 21, 2008 27 - FLIGHT CONTROLS Page 1 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 1 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) SYSTEM OVERVIEW INTRODUCTION The fly by wire flight control system controls: - the primary flight controls which control the pitch, roll and yaw axis, - the secondary flight controls which include the speed brakes and ground spoilers (Lift dumping), - the high lift function which includes the flaps and slats. The flight control system is monitored by the Onboard Maintenance System (OMS) for maintenance and troubleshooting functions. When doing maintenance on the aircraft, all safety procedures listed in the Aircraft Maintenance Manual (AMM) must be applied. Let's see their location on the A/C. G7508471 - G7UT0TU - FM27B1000000001 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 2 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 2 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - INTRODUCTION CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 3 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 3 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - INTRODUCTION CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 4 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 4 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL This Page Intentionally Left Blank G7508471 - G7UT0TU - FM27B1000000001 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 5 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 5 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) SYSTEM OVERVIEW (continued) FLY BY WIRE PRINCIPLE The relation between the pilot input on the side stick and the aircraft response is called control law. The pilot's side stick orders are sent to the flight control computers. The computers elaborate the control law surface deflection orders. An electrical command signal is sent to the related surfaces servo actuator. The aircraft response feedback is sent back to the flight control computers and compared to the pilot orders. The fly by wire design requires the aircraft to be servo-looped. NOTE: Note: Side stick electrical command signals are sent to the computers, which elaborate surface deflection orders and send electrical command signals to servo-actuators to move surfaces. It replaces the mechanical link found on conventional aircraft flight control systems. G7508471 - G7UT0TU - FM27B1000000001 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 6 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 6 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - FLY BY WIRE PRINCIPLE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 7 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 7 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) SYSTEM OVERVIEW (continued) FLIGHT CONTROL LAWS The deflection orders are processed by the flight control system according to different control laws. The aircraft is controlled in all axes through: - the pitch control law, - the lateral control law (roll and yaw). Depending on the status of the flight control system or other systems (number of computers available, status of peripheral components and sensors) three different sets of control laws can be engaged: - the normal law, with all protections, - the alternate law, with reduced protections, - the direct law, without protections. Control laws automatically switch from normal to alternate or direct according to the nature and number of failures. After loss of normal laws, the reconfiguration of control laws is different for the pitch axis and for the lateral axis. The normal law is only implemented in the FCPCs. The FCSCs can only compute the yaw alternate law and the direct law. G7508471 - G7UT0TU - FM27B1000000001 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 8 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 8 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - FLIGHT CONTROL LAWS CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 9 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 9 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) SYSTEM OVERVIEW (continued) FLIGHT CONTROLS ARCHITECTURE The three FCPCs, also called "PRIM", and the two FCSCs, also called "SEC", receive pilot orders from: - the side sticks, - the rudder pedals, - the rudder trim control panel - the speed brake control lever. The FCPCs receive autopilot inputs from the Flight Management Guidance and Envelope Computers (FMGECs). The FCPCs and FCSCs interface together. They control and monitor: - the ailerons, - the spoilers, - the elevators, - the rudder. The THS is controlled by the FCPCs only. The THS can also be mechanically operated through the trim wheel. In case of loss of the FCPCs and FCSCs, the Backup Control Module (BCM) controls the aircraft yaw via the rudder. The two Flight Control Data Concentrators (FCDCs) interface the FCPCs and FCSCs with: - the Electronic Instrument System (EIS), G7508471 - G7UT0TU - FM27B1000000001 - the Centralized maintenance system (CMS), - the recording system. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 10 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 10 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - FLIGHT CONTROLS ARCHITECTURE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 11 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 11 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) SYSTEM OVERVIEW (continued) COMPUTER MASTER / SERVO LOOP CONFIGURATION The 3 FCPCs and the 2 FCSCs fulfill two functions: - the computation part which elaborates the surface deflection orders, - the execution part which fulfills the servoing of the deflection orders. One computer only (FCPC 1 in normal configuration) is the master. This computer generates the deflection orders and transmits them to the other computers. The five computers signal their related surfaces and fulfill the servo loop controls. Each computer establishes the highest level of law that can be engaged according to its internal monitoring and the availability of ADIRUs, control signals, surface actuation and the positions of the THS, the flaps and the slats. The computer which has the highest level of law, and according to the computer priority, is the master for law computation: normally FCPC 1, then FCPC 2 and 3. Among the computers which can engage the highest level of law, the computer having the top priority is chosen. NOTE: Note: the priority logic for law engagement is totally G7508471 - G7UT0TU - FM27B1000000001 independent from the servo-loop engagement logic. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 12 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 12 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 SYSTEM OVERVIEW - COMPUTER MASTER / SERVO LOOP CONFIGURATION CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 13 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 13 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) ACTUATION RECONFIGURATION PRIORITY PRIORITY SERVOCONTROLS There are two servo controls for each aileron and elevator surface. In ACTUATORS normal configuration, one servo control actuates the surface. It is The actuators are hydraulically powered by one of the three hydraulic called priority servo control and is in active mode. The second, which circuits, except the THS servo-motors which are electrically driven. follows the surface deflection, is in damping mode. Roll control is done by the one inboard and one outboard aileron on A third mode called re-centering sets the surfaces in neutral position each wing and the roll spoilers (spoilers 2 through 6). The aileron in case of specific failures (for elevators on all A330, 340 and also droop function is provided by all the ailerons. The ailerons are inboard ailerons for A340-500/600). deflected downwards when the flaps are extended to follow the There are three servo controls for the rudder. Alls are active at the contours of the wing. The aileron droop function increases the lift on same time. the part of the wing with no flaps. There is only one servo control per spoiler. The pitch control is done by the elevators and by the Trimmable RECONFIGURATION PRIORITIES Horizontal Stabilizer (THS). The trim wheel can also mechanically control the hydraulic motors. The trim wheel has priority over the In normal configuration, the following computers ensure the servoloop electrical control. The mechanical control is used: control. The arrows indicate the actuation reconfiguration priorities - on ground, for setting the THS take-off trim, in case of either electrical failure, computer failure or loss of hydraulic - in flight, as a back-up system if THS electrical control is lost. circuits. The rudder fulfills the yaw control. The Pedal Feel and Trim Unit (PFTU) gives rudder pedal artificial feel, trim function and feedback movement. The Backup Control Module(BCM) is an electronic module, which fulfills the yaw control in case of flight control computer failures. The G7508471 - G7UT0TU - FM27B1000000001 Backup Power Supplies (BPSs) supply electrical power to the BCM from two hydraulically driven motors. The BCM transmits the rudder pedals order to the rudder, and also fulfills dutch roll damping. The PFTU interfaces the BCM with the pedals. All spoilers fulfill the speed brake function. All the spoilers fulfill the ground lift dump function when specific ground logic conditions are fulfilled. COMPUTERS The relationship between actuators and computer is indicated on the schematic. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 14 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 14 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 ACTUATION RECONFIGURATION PRIORITY - ACTUATORS... RECONFIGURATION PRIORITIES CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 15 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 15 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) o use the LEAK MEASUREMENT VALVES P/BSW, isolate the MEL/DEACTIVATION other servocontrol which has not to be tested, o use the LEAK MEASUREMENT VALVES P/BSW in order to DEACTIVATION OF THE OUTBOARD AILERON isolate the other servocontrol which has not to be tested, SERVOCONTROL o operate the side stick to move the aileron. The procedure is similar for each of the outboard aileron servocontrols. If no other servicing tasks have to be completed, the area can be closed. Put the related hydraulic system in the depressurized configuration A warning notice will be placed in the cockpit to tell the crew that the before maintenance action: outboard aileron servocontrol is unserviceable and an entry has to be - open, safety and tag the circuit breakers related to the Engine Driven made in the logbook. Pump (EDP) and Electrical pumps, - make sure that there is no hydraulic supply from a ground power NOTE: The C/Bs 7CE3 and 7CE4 have to be closed at the same cart, time. If this operation is not properly done, the FAULT - check on the ECAM SD HYD page that the pressure of the related legend of the primary (PRIM) 3 P/BSW comes on. In this hydraulic system is 0 psi, case, repeat the opening and closing of both C/Bs. - put the warning notices in position to tell persons not to pressurize the related hydraulic system on the hydraulic control panel in the cockpit and on the ground service panel of the related hydraulic system. Place a warning notice in the cockpit to tell persons not to operate the flight controls. Open, safety and tag all the circuit breakers related to the Flight Control Computers (FCPC and FCSC). Make sure that the pressure and the return lines are correctly connected G7508471 - G7UT0TU - FM27B1000000001 to the servocontrol and check that there is no hydraulic leakage at the servocontrol. Disconnect the electrical connector from the receptacle of the servocontrol and place blanking caps on both connector and receptacle to protect them. Do not forget to safely attach the connector to a pipe with a tie-wrap. Remove the tags and close all the previously Flight Control Computers (FCPC and FCSC) opened C/Bs. To do the operational test of the aileron hydraulic actuation, make sure that the deactivated servocontrol does not operate. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 16 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 16 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE OUTBOARD AILERON SERVOCONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 17 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 17 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE OUTBOARD AILERON SERVOCONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 18 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 18 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE OUTBOARD AILERON SERVOCONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 19 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 19 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE OUTBOARD AILERON SERVOCONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 20 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 20 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE OUTBOARD AILERON SERVOCONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 21 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 21 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Pressurize the aircraft hydraulic systems. Push the F/CTL key to show MEL/DEACTIVATION (continued) the F/CTL page on the SD. On the EWD, make sure that the F/CTL PRIM 1 PITCH FAULT warnings are shown. DEACTIVATION OF THE THS ACTUATOR On the two F/CTL panels, release out PRIM 1, 2 and 3 P/BSWs. The ELECTRICAL MOTOR OFF indications come on. Move the pitch trim control wheels located The Pitch Trim Actuator (PTA) controls the THS hydraulic motors. on the center pedestal to the fully UP position. Press in the PRIM 1 The PTA has three brushless Direct Current (DC) motors. Each P/BSW located on the FLT/CTL section of the panel 241VU and make electrical motor is connected to one FCPC. sure that the pitch trim control wheels do not move. On the EWD, check that the F/CTL STAB CTL FAULT warning NOTE: The deactivation is given for the electrical motor 1 but the message comes on. procedure is the same for motors 2 and 3. Do the BITE test of the Electrical Flight Control System (EFCS) via Put the related hydraulic system in the depressurized configuration the GND SCANNING command and make sure that the subsequent before maintenance action: maintenance message is shown: - open, safety and tag the circuit breakers related to the EDP and - FCPC1 (2CE1)/WRG/THS ACTR CIRCUIT BREAKER TO FCPC Electrical pumps, 1, as the circuit breaker for THS actuator motor 1 is open. - make sure that there is no hydraulic supply from a ground power Press in the PRIM 2 and PRIM 3 P/BSWs, the OFF indications cart, disappear. Check that the pitch trim control wheels automatically - check on the ECAM SD HYD page that the pressure of the related move back to the 4° UP position. hydraulic system is 0 psi, Depressurize the aircraft hydraulic systems. If no other servicing tasks - put the warning notices in position to tell persons not to pressurize have to be completed, the area can be closed. Put a warning notice in the related hydraulic system on the hydraulic control panel in the the cockpit to tell the flight crew that one THS actuator motor (1, 2 cockpit and on the ground service panel of the related hydraulic or 3) is deactivated. Do not forget to make an entry in the A/C system. technical logbook. G7508471 - G7UT0TU - FM27B1000000001 On the FLT CTL section of the overhead panel, make sure that the PRIM 1, PRIM 2, PRIM 3, SEC 1 and SEC 2 P/BSWs are pressed in NOTE: If the ECAM warning PRIM 1(2)(3) PITCH FAULT related the ON position and no indications on the P/BSWs are on. to the class 1 maintenance message F/CTL PRIM 1 PITCH In the avionics compartment, get access to the C/B panels. Open, FAULT EFCS 1(2) PITCH TRIM ACTR 1 was shown; the safety and tag the C/B related to the electrical motor, as shown in the inspection of the ball screw assembly for integrity of the table. primary and secondary load paths must be done (Ref. TASK 27-44-51-210-805). NOTE: Open only the C/Bs of the THS actuator electrical motor to deactivate it. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 22 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 22 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 23 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 23 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 24 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 24 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 25 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 25 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 26 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 26 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 27 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 27 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 28 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 28 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MEL/DEACTIVATION - DEACTIVATION OF THE THS ACTUATOR ELECTRICAL MOTOR CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 29 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 29 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) MAINTENANCE TIPS EXTENSION OF THE SPOILERS FOR MAINTENANCE To get access to the spoiler actuators, extend the flaps and secure the selector with the locking tool. If the flaps cannot be extended access is done by removing the applicable access panel. Place warning notices in the cockpit to prevent flight control operation. To extend the spoilers for maintenance, install the spoiler maintenance key in the maintenance device and turn it in the "M" position. Move the spoiler to the extended position with your hand and secure it with the safety collar-spoiler. If no other servicing tasks have to be completed the area can be closed. NOTE: The spoiler can move on its own with its weight. G7508471 - G7UT0TU - FM27B1000000001 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 30 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 30 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MAINTENANCE TIPS - EXTENSION OF THE SPOILERS FOR MAINTENANCE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 31 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 31 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MAINTENANCE TIPS - EXTENSION OF THE SPOILERS FOR MAINTENANCE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 32 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 32 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27B1000000001 MAINTENANCE TIPS - EXTENSION OF THE SPOILERS FOR MAINTENANCE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) FLIGHT CONTROLS LINE MAINTENANCE BRIEFING (2) Nov 20, 2008 27 - FLIGHT CONTROLS Page 33 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 33 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL ROLL D/O (3) GENERAL AILERONS-PRESENTATION The ailerons in conjunction with the roll spoilers (spoilers2 to 6) do the Each aileron is actuated by two interchangeable electro-hydraulic aircraft roll control. servocontrols powered by different hydraulic systems. The rudder (Yaw control) carries out automatically the turn coordination The servocontrols on the inboard aileron and the servocontrols on the and the dutch roll damping. outboard aileron are not interchangeable. In MANUAL CONTROL MODE: the side stick roll transducers send roll inputs to the Flight Control Primary AILERONS-NORMAL OPERATION Computers (FCPCs) and Flight Control Secondary Computer (FCSCs). Each servocontrol is connected to: In AUTOPILOT CONTROL MODE: - 2 computers for the inboard aileron (1 FCPC and 1FCSC), the Flight Management Guidance and Envelope Computers (FMGECs) - 1 computer for the outboard aileron (1 FCPC or 1 FCSC), send guidance orders to the FCPCs only. for servoloop and to satisfy the servoloop reconfiguration order shown When Autopilot (AP) is engaged the side sticks are locked by solenoid by the reconfiguration arrows. operated load threshold device. If a pilot overrides such a force threshold, The aileron servocontrols have two control modes, active and damping. he will cause the AP disengagement. In normal configuration, the outer servocontrol of each aileron is in active The master computer (normally FCPC1 computation part) calculates the mode, the inner servo control is in damping mode. roll deflection orders. and sends it to all the FCPCs and FCSCs (execution part). These AILERONS-ABNORMAL OPERATIONS computers achieve the servoing of aileron and roll spoiler servocontrols. The Flight Control Computers need signals from the Air Data/Inertial HYDRAULIC OR ELECTRIC FAILURE: Reference Units (ADIRUs) to establish the aircraft response (roll attitude, - if a servocontrol in active mode is not hydraulically powered or not roll rate...), electrically controlled anymore, the faulty servocontrol falls in the G7508471 - G7UT0TU - FM27D3000000003 AT HIGH SPEED (Vc higher than 190 kts), in clean configuration damping mode and the adjacent one becomes active. (slats/flaps retracted) the outboard ailerons are servoed to zero. - if both servocontrols of an aileron are faulty, both servocontrols are in In autopilot mode and in some failure cases, the outboard ailerons are damping mode which prevents the appearance of flutter. used up to 300 kts. AILERONS DROOP: AILERONS/SPOILERS-SPECIAL CASES This function is used to deflect symmetrically the ailerons downwards. When the Ram Air Turbine (RAT) is extended, the outboard ailerons when the flaps are extended. are not used, the related servocontrols are switched to the damping mode in order to minimize the hydraulic consumption. On ground, with hydraulic systems depressurized, it is acceptable to see the ailerons droop due to their weight. MLA MANEUVER LOAD ALLEVIATION: CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 34 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 34 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL The function of the MLA is to redistribute the lift over the wing to relieve structural loads on the outer wing surfaces and so reducing the bending moment of the wing. The MLA function raises symmetrically the ailerons and the spoilers 4,5,and 6.The deflection is proportional to load factor in excess of 2 g. An elevator demand is simultaneously applied to compensate the pitching moment induced by the spoilers and the ailerons. ROLL SPOILERS-GENERAL Each spoiler is actuated by an electro-hydraulic servocontrol. All the servocontrols are of the same size, but have different lengths of travel. The Spoiler servocontrol principles will be detailed later in the modules Primary Control Speed Brake and Lift Dumping. G7508471 - G7UT0TU - FM27D3000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 35 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 35 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D3000000003 GENERAL... ROLL SPOILERS-GENERAL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 36 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 36 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D3000000003 GENERAL... ROLL SPOILERS-GENERAL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 37 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 37 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL ROLL D/O (3) AILERON SERVO CONTROL PRINCIPLES ACTIVE MODE In the active mode, the aileron servo-control actuator is pressurized and the solenoid valve energized by the computer. G7508471 - G7UT0TU - FM27D3000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 38 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 38 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D3000000003 AILERON SERVO CONTROL PRINCIPLES - ACTIVE MODE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 39 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 39 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL ROLL D/O (3) AILERON SERVO CONTROL PRINCIPLES (continued) DAMPING MODE If the solenoid valve is de-energized or the servo-control actuator is not pressurized, the servo control actuator is in damping mode. In damping mode, the actuator follows the control surface movements. G7508471 - G7UT0TU - FM27D3000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 40 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 40 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D3000000003 AILERON SERVO CONTROL PRINCIPLES - DAMPING MODE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 41 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 41 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL ROLL D/O (3) AILERON SERVO CONTROL PRINCIPLES (continued) TEST/ADJUSTMENT The servo control design enables the test of the accumulator and internal valves using the accumulator sight indicator and a test finger. The test finger is manually operated by using an hexagon socket wrench. The adjustment is possible by acting on the position feedback device. G7508471 - G7UT0TU - FM27D3000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 42 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 42 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D3000000003 AILERON SERVO CONTROL PRINCIPLES - TEST/ADJUSTMENT CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) ROLL D/O (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 43 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 43 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) GENERAL The pitch control is achieved by two elevators and Trimmable Horizontal Stabilizer (THS). The elevators are used for short-term pitch control, the THS for long-term pitch control. In MANUAL CONTROL MODE: the pitch is controlled from the side stick pitch transducers which send electrical signals to the Flight Control Primary Computers (FCPCs) and Flight Control Secondary Computers (FCSCs). In AUTOPILOT (AP) CONTROL MODE, the Flight Management Guidance and Envelope Computers (FMGECs) send guidance orders to the FCPCs only. When the AP is engaged, the side sticks are locked by a solenoid-operated load threshold device energized by the FMGECs. The master computer (normally FCPC 1 computation part) calculates the elevators and the THS deflection orders and sends them to all the computer execution parts that achieve the servoing of the elevator servocontrols and THS actuator. The Flight Control Computers also need signals from: - Air Data Reference Units (ADIRUs) to establish the A/C response (pitch attitude, load factor, etc) - two vertical accelerometers for turbulence damping function and in case G7508471 - G7UT0TU - FM27D2000000003 of ADIRU failure. ELEVATORS PRESENTATION Each elevator is actuated by two interchangeable hydraulic servocontrols. Each servocontrol has three operating modes: active mode, damping mode and re-centering mode. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 44 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 44 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 GENERAL & ELEVATORS PRESENTATION CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 45 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 45 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) ELEVATORS NORMAL OPERATION Each elevator servocontrol is connected to two computers (one FCPC and one FCSC). In the normal configuration, the inboard servocontrol is in active mode while the outboard is in damping mode. FCPC 1 having the servo-loop control priority: - sets its dedicated servocontrol in active mode and ensures the servoloop control, - commands the damping mode on the adjacent servocontrol (one solenoid valve (S) energized). For the elevator servolooping computation the computers need to acquire: - the elevator surface position, - the elevator servocontrol piston position. This information is sent by servocontrol transducers (XDCRs) units and the surface position transducer (RVDT). In the event of large deflection demands, the two servo-controls can become active to avoid the saturation of one servocontrol. ELEVATORS ABNORMAL OPERATIONS HYDRAULIC OR ELECTRICAL FAILURE If a servocontrol being in active mode is either not hydraulically powered G7508471 - G7UT0TU - FM27D2000000003 or not electrically controlled anymore, the faulty servocontrol falls in damping mode and the adjacent one becomes active according the servoloop reconfiguration. If both servocontrols of one elevator are depressurized, both servocontrols are in damping mode which prevents fluttering. When P1, P2, S1 and S2 are no longer able to control their dedicated servocontrol (ie: inputs missing, electrical failure, etc...), the servocontrols fall in re-centering mode. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 46 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 46 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 ELEVATORS NORMAL OPERATION & ELEVATORS ABNORMAL OPERATIONS CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 47 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 47 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) ELEVATORS SERVO CONTROL PRINCIPLES ACTIVE MODE When the elevator servo control is in the active mode, both solenoid valves are de-energized. The servovalve is controlled by its dedicated computer and the solenoid valves by other computers. The servo control is pressurized. G7508471 - G7UT0TU - FM27D2000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 48 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 48 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 ELEVATORS SERVO CONTROL PRINCIPLES - ACTIVE MODE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 49 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 49 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) ELEVATORS SERVO CONTROL PRINCIPLES (continued) DAMPING MODE In damping mode, one of the two solenoid valves is energized by the computer controlling the adjacent servocontrol. The servo control is also considered in damping mode if not hydraulically pressurized. G7508471 - G7UT0TU - FM27D2000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 50 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 50 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 ELEVATORS SERVO CONTROL PRINCIPLES - DAMPING MODE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 51 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 51 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) ELEVATORS SERVO CONTROL PRINCIPLES (continued) RE-CENTERING MODE When the elevator servo control is in the re-centering mode, both solenoid valves are de-energized and no command signals are sent to the servo valve. The servocontrol is hydraulically powered. Thanks to the mechanical feedback linkage, the servo control is mechanically controlled in its neutral position. G7508471 - G7UT0TU - FM27D2000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 52 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 52 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 ELEVATORS SERVO CONTROL PRINCIPLES - RE-CENTERING MODE CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 53 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 53 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (ELEVATOR) (3) ELEVATORS SERVO CONTROL PRINCIPLES (continued) TEST/ADJUSTMENT The servo control design enables the test of the accumulator, the inlet blocking valve, the return blocking valve and the return relief valve using the accumulator sight indicator and a test finger. The test finger is manually operated by using an hexagon socket wrench (see maintenance manual). Rigging of the servocontrol is done by adjusting the piston rod length. G7508471 - G7UT0TU - FM27D2000000003 CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 54 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 54 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27D2000000003 ELEVATORS SERVO CONTROL PRINCIPLES - TEST/ADJUSTMENT CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (ELEVATOR) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 55 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 55 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL PITCH D/O (THSA) (3) GENERAL In conjunction with the two elevators, a Trimmable Horizontal Stabilizer (THS) is used to control the pitch of the aircraft. TRIMMABLE HORIZONTAL STABILIZER (THS) The THS is attached to a ball nut which is actuated by a ball screw jack and powered by two hydraulic motors linked through a differential. The ball screw jack has a fail safe design. It consists of a double load path. THS MECHANICAL CONTROL The THS mechanical control can be used: - on ground, for maintenance or take off trim setting. - in flight, as a standby system if automatic control (autotrim) is not available. When an input is made, the feedback differential gearbox comparator compares the input with the movement of the ball screw jack (feedback gear). The difference between the two mechanical signals is shown as the control differential output. The control differential output moves the control valve. G7508471 - G7UT0TU - FM27DC000000002 The control valve opens and lets hydraulic fluid go into the hydraulic motors. Both hydraulic motors operate at the same time and drive the ball screw jack, which in turn, moves the THS. During operation with Electric pump, when the flow rate is low, the pressure maintaining device keeps the pressure-off brakes released. When the THS actuator gets to the demanded position the feedback gear moves the control differential input, which decreases the control valve opening. The control valve closes and stops the hydraulic flow to the motors. The ball screw jack stops at the commanded position. CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (THSA) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 56 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 56 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019  A330-200/300 TECHNICAL TRAINING MANUAL G7508471 - G7UT0TU - FM27DC000000002 GENERAL... THS MECHANICAL CONTROL CMQ - SA family to A330-200/300 - T1+T2 (Lvl 2&3) (RR Trent 700) PITCH D/O (THSA) (3) Nov 20, 2008 27 - FLIGHT CONTROLS Page 57 B1/B2_A330_DIFF_FR_A320 DVIATION TRAINING SERVICES 57 REV. 1 FOR TRAINING PURPOSES ONLY DATE: 01.06.2019