Gulfstream G650ER Flap Interface and Control PDF

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL FLAP INTERFACE AND CONTROL — SYSTEM DESCRIPTION 1. General A. Description The flap control system provides electrical and mechanical control of the flaps, fault monitoring and annunciation. The flap actuation system provides actuation and control of the fl...

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL FLAP INTERFACE AND CONTROL — SYSTEM DESCRIPTION 1. General A. Description The flap control system provides electrical and mechanical control of the flaps, fault monitoring and annunciation. The flap actuation system provides actuation and control of the flap surface on the left and right wing. See Figure 1 and Figure 2. See Flap Control, 27-50-00, System Description for more information on the flap control system. The flap control system operates separately from the primary flight control system. The primary flight controls are the ailerons, spoilers, elevators and rudders. The following are included in the flap interface and control system: Flap Control Module (FCM) Flap handle Flap Electronic Control Unit (FECU) Hydraulic Control Module (HCM) Hydraulic Power Drive Unit (PDU) Two actuators per flap surface Dual channel position sensors Torque shafts and pillow blocks Alternate flap switch Quick-disconnect switch The FCM is installed in the pedestal in the cockpit. The FCM contains the flap handle. The FCM interfaces with the aircraft wiring through two electrical connectors. The FCM also has an edge lit panel to provide for low light operation. The FCM outputs two types of signals: RVDT signals Discrete signals Two RVDT signals provide the selected flap handle position to the FECU. Three discrete signals provide selected flap handle position data directly to the Flight Control Computers (FCCs). The FCC does data concentration and consolidation of the flap handle discrete switches. The discrete signals are converted to A429 format and sent to the FECU. The selected flap handle position information from two different sources is used as redundant sources of information by the FECU to calculate the flap position command signal to the flap actuators. 2. Component Location COMPONENT ATA QTY PER A/C LOCATION Flap 27-51-01 2 Inboard wing trailing edge A track flap roller 27-51-03 4 Flap A track B track flap roller 27-51-03 12 Flap B track C track flap roller 27-51-03 12 Flap C track D track flap roller 27-51-03 4 Flap D track D track flap down load catch roller 27-51-05 4 Left and right wings 27-51-00 Page 1 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL 3. Component Details A. Flap When extended, flap surfaces provide a controlled increase in the wing lift and drag, as required, for aircraft takeoff, approach and landing. Both left and right flaps are simultaneously operated by the flap actuation system to extend or retract according to pilot input. Flaps are electronically controlled and monitored by the FECU command and monitor paths during normal operation. The command and monitor paths each perform flap position and flap asymmetry monitoring. If either the command or monitor path fails, then the failed path loses the ability to control the flaps, but the remaining healthy path continues to report flap positions and flap asymmetry. If either command or monitor path detects an asymmetry the system is disengaged, thus inhibiting flap motion. B. A Track Flap Roller Each flap surface is connected and mounted to the wing by means of roller assemblies. The roller assemblies are guided on four supporting tracks (A, B, C, D). The tracks are mechanically fastened to the wing rear beam. The flap track rollers assist flap movement along the flap tracks and prevent flap contact with the flap tracks. C. B Track Flap Rollers See A Track Flap Roller component details for information on B flap track rollers. D. C Track Flap Rollers See A Track Flap Roller component details for information on C flap track rollers. E. D Track Flap Rollers See A Track Flap Roller component details for information on D flap track rollers. F. D Track Down Load Catch The D track flap down load catch roller is located on the leading edge of the flap at flap track D. The flap down load catch roller prevents the flap from coming off the flap track at full flap extension. 4. Operation A. Flap Interface and Control The flap actuation system provides actuation and control of the flap surface located on the trailing edge of each wing. When extended, the flaps provide a controlled increase in wing lift and drag, as required, for aircraft takeoff, approach and landing. Both left and right flaps are simultaneously operated by the flap actuation system to extend or retract according to pilot input. The pilot input is provided through the FCM. The desired flap position is selected by lifting the detent pin out of the current detent. The RVDTs and discrete switches provide handle position feedback to the FECU. The FCC monitors the discrete switch positions and provides the FECU with the switch status. The FECU excites and demodulates the RVDTs. The new flap position is based on the flap handle position determined from the RVDTs and the discrete switches. The FECU controls flap deployment and retraction by energizing a solenoid operated valve and controlling hydraulic flow through an electro-hydraulic servo valve. The HCM applies hydraulic power to the PDU for flap extension or retraction. The PDU drives the flap actuators via torque driveshafts to position the flap surfaces. The dual resolvers connected to the outboard flap 27-51-00 Page 2 August 15/14