Gulfstream G650ER Flap System Sensors and Indication PDF

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL FLAP SYSTEM SENSORS AND INDICATION — SYSTEM DESCRIPTION 1. General A. Description The flap control system is a conventional system. Both left and right flaps are simultaneously operated by the flap actuation system to extend or retract according to pilot i...

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL FLAP SYSTEM SENSORS AND INDICATION — SYSTEM DESCRIPTION 1. General A. Description The flap control system is a conventional system. Both left and right flaps are simultaneously operated by the flap actuation system to extend or retract according to pilot input. The flap handle controls flap position. The flap control system interfaces with and provides flap position data to the Flight Control Computers (FCCs). See Figure 1. NOTE: The FCCs do not provide direct control data to the flaps. The Flap Electronic Control Unit (FECU) controls flap movement. There are also two electrically independent RVDT position sensors inside the flap handle. The flap handle is located in the flap control module on the pedestal. In normal operational mode, the FECU provides excitation voltage to the flap position sensors and monitors flap and flap handle position. See Flap System Electronics, 27-55-00, System Description for more information on the flap control handle. 2. Component Location COMPONENT ATA QTY PER A/C LOCATION Flap position resolver 27-54-01 2 Outboard flap actuator 3. Component Details A. Flap Position Resolver There is a flap position feedback resolver installed on each outboard flap actuator. The FECU provides excitation voltage and frequency to the flap resolvers and continuously monitors the resolvers to determine flap position. The resolver voltage, frequency and input / output impedance are compatible with the FECU. As the flaps move, the voltage changes. The resulting change in voltage (bias) is monitored by the FECU to determine flap position. NOTE: The product of the electrical input and the sine and cosine of the angle that the resolver rotor has been turned determines the flap position. The positional accuracy of the resolver supports the following: Specified flap positioning accuracy Flap indication accuracy Rate control requirements 4. Controls and Indications A. Circuit Breakers The system is protected by the following circuit breakers: NOMENCLATURE PANEL LOCATION POWER SOURCE FLAP MON REER A8 R ESS 28VDC FLAP CMD LEER A10 L ESS 28VDC 27-54-00 Page 1 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL B. CAS Messages The CAS messages for the system are shown in the following table: MESSAGE COLOR Flaps Maintenance Required Blue Flap Rigging Complete Blue Indicates to the maintenance that rigging is complete. Flaps Asymmetry Amber Flap position asymmetry detected. Flaps have stopped moving toward selected position. Plan for landing with reduced flap setting. Flap Command Invalid Amber Flap handle is placed or jammed in an invalid position. Reposition flap handle to valid position. Flaps Failed Amber No surface movement when flap handle is commanded or surface movement in opposite direction or uncommanded flap surface movement. Place handle to previous position, reduce airspeed and reset handle to desired position. If flap operation not recovered, plan for landing with reduced flap setting. Uncommanded Flaps Amber Flap motion detected without a command input. Plan for landing wit reduced flap setting. NOTE: MESSAGE DESCRIPTION System has detected a fault but is still operational. The FECU status information required by the flightcrew is shown on the main displays as CAS messages and synoptic page data. 5. Operation A. Flap System Sensors and Indication Both left and right flaps are simultaneously operated by the flap actuation system to extend or retract according to pilot input using the flap handle. Pilot inputs are sensed by two, single channel RVDTs on the flap handle. The FECU controls the flap position based on flap position and flap resolver position. Position data is transmitted to the FCCs and avionics system from each FECU channel. 27-54-00 Page 2 August 15/14