Cirrus Garmin GFC 700 Maintenance Manual Download Page 6

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HAPTER

22-10: GFC 700 A

UTOMATED

LIGHT

ONTROL

YSTEM

CIRRUS A

IRPLANE

AINTENANCE

ANUAL

ENERAL

MODELS SR22

AND

SR22T

Figure 22-10-1:

GFC 700 Autopilot System Schematic

GMC 707 AFCS

MODE CONTROLLER

PITCH TRIM

CARTRIDGE

GIA 63W

INTEGRATED

AVIONICS

COMPUTER

GIA 63W

INTEGRATED

AVIONICS

COMPUTER

MFD

PFD

GTA 82

PITCH TRIM

ADAPTER

GSA 80 /

GSM 86

YAW SERVO

(optional)

GSA 81 /

GSM 86

ROLL SERVO

GSA 81 /

GSM 86

PITCH SERVO

4-WAY

TRIM

GO-AROUND

SWITCH

A/P DISC

NOTE

Yaw control is only available
on three-axis configuration.

SR22_MM22_4957

23 Dec 2016

Summary of Contents for Garmin GFC 700

Page 1: ...nd is used to stabilize aircraft pitch roll and yaw optional axes Pitch autotrim provides trim commands to the pitch trim servo to relieve any long term effort required by the pitch servo The system c...

Page 2: ...vos and provides Autopilot engagement and annunciation Autopilot command and control Auto trim operation Manual electric trim Two axis airplane control pitch and roll including approaches Level LVL mo...

Page 3: ...apter interfaces with the dual GIA 63W Integrated Avionics computers through serial communication on separate RS 485 ports Trim commands from the yoke switches are routed through the GTA 82 when autop...

Page 4: ...nd controls engagement of the drive clutch solenoid The servo mount contains a capstan and slip clutch The capstan transfers the output torque of the servo actuator to the mechanical flight control su...

Page 5: ...is positioned in front of the MFD and PFD For maintenance practices pertinent to the GCU 479 FMS keyboard see Flight Management Computing section of Navigation And Pitot Static Systems Refer to 34 60...

Page 6: ...MC 707 AFCS MODE CONTROLLER PITCH TRIM CARTRIDGE GIA 63W INTEGRATED AVIONICS COMPUTER 2 GIA 63W INTEGRATED AVIONICS COMPUTER 1 MFD PFD GTA 82 PITCH TRIM ADAPTER GSA 80 GSM 86 YAW SERVO optional GSA 81...

Page 7: ...Perspective Avionics system is in proper working order Check for proper operation of GIA Integrated Avionics Unit GSU ADAHRS and all GSA servos Verify no red X s are displayed on MFD and PFD Verify n...

Page 8: ...solution of annunciation No aural alert is heard after successful pre flight test Audio operation fault has occurred Repeat autopilot engagement followed by disengagement to confirm audio operation fa...

Page 9: ...C 707 Check GMC 707 wiring and connector Perform Operational Test GFC 700 Autopilot Refer to 22 10 Replace GMC 707 Refer to 22 10 MANIFEST GMC software mismatch Communication halted annunciation is di...

Page 10: ...nunciation is displayed on PFD The elevator is mis trimming down Check AUX SYSTEM STATUS page on MFD to verify pitch servo is online green check Verify pitch servo is receiving power Check pitch servo...

Page 11: ...ational Test GFC 700 Autopilot Refer to 22 10 Replace roll servo Refer to 22 10 AIL black text on yellow background annunciation is displayed on PFD The aileron is mis trimming to right Check for poss...

Page 12: ...onfiguration Probable Cause Remedy YAW white text on red background annunciation is displayed on PFD Yaw axis failure has occurred Check AUX SYSTEM STATUS page on MFD to verify yaw servo is online gre...

Page 13: ...in lb 1 69 Nm of torque during disengage ment e Turn fasteners counter clockwise to loosen locking cams f Disconnect electrical connector from back of mode controller Remove mode controller 2 Install...

Page 14: ...se to tighten locking cams Torque fasteners 20 2 in lb 2 26 0 22 Nm f Reset KEYPADS AP CTRL circuit breaker g If GMC 707 has been replaced with a new or different unit or original unit has been repair...

Page 15: ...L CHAPTER 22 10 GFC 700 AUTOMATED FLIGHT CONTROL SYSTEM MODELS SR22 AND SR22T MAINTENANCE PRACTICES 15 Figure 22 10 2 GMC 707 AFCS Mode Controller 1 RADIO MODULE BRACKET REF LEGEND 1 GMC 707 Mode Cont...

Page 16: ...assembly GTA 82 Pitch Trim Adapter a Remove screws and washers securing pitch trim adapter to mounting plate 3 Assembly GTA 82 Pitch Trim Adapter a Position mounting plate to pitch trim adapter and se...

Page 17: ...YSTEM MODELS SR22 AND SR22T MAINTENANCE PRACTICES 17 Figure 22 10 3 GTA 82 Pitch Trim Adapter RH AFT LONGERON REF LEGEND 1 Mounting Plate 2 Pitch Trim Adapter 3 Screw 4 Washer 5 Bolt 6 Spacer 7 Nut TI...

Page 18: ...ION The servo actuator and servo mount must fit flush together withnogapsbeforetighteningmountingbolts Donotunder any circumstances try to close gap by tightening mounting bolts or the servo mount wil...

Page 19: ...to servo output gear e Install GSA 80 servo actuator Refer to 22 10 D GSA 81 Servo Actuator See Figure 22 10 4 See Figure 22 10 5 1 Removal GSA 81 Servo Actuator a Set BAT 1 BAT 2 and AVIONICS switch...

Page 20: ...lb 3 95 0 56 Nm Refer to 20 60 e Connect servo actuator connector to aircraft harness NOTE Ensure that harness is properly secured to the airframe f Reset AP SERVOS circuit breaker g If GSA 81 has be...

Page 21: ...AT 1 BAT 2 and AVIONICS switches to OFF positions b Pull AP SERVOS circuit breaker c Remove access panel CF5 Refer to 6 00 d Serials w Air Conditioning Remove condenser Refer to 21 50 e Disconnect pit...

Page 22: ...tan and wrap short end of bridle cable approximately 480 clockwise such that cable exits bottom of capstan NOTE Align cable keeper so arm extends through mounting bracket hole but does not contact pul...

Page 23: ...tension If elevator control cable tension falls outside specified tolerance perform Adjustment Test Elevator System Rigging Refer to 27 30 e On servo capstan position bridle cable stop ball at 9 o clo...

Page 24: ...cable clamps is set 25 0 2 0 0 0 lb 11 3 0 9 0 0 kg If bridle cable tension falls outside speci fied tolerance loosen aft clamp assembly and adjust bridle cable as required to obtain 25 0 2 0 0 0 lb 1...

Page 25: ...astellated Nut 7 Pulley 8 Bridle Cable 9 Bolt 10 Star Washer 5 21 22 4 9 3 10 16 15 1 5 14 6 9 2 ELEVATOR CABLES REF BRACKET REF NOTE 4 4 13 9 9 4 4 4 9 4 9 4 9 4 12 7 17 BULKHEAD FS186 REF 11 Retaini...

Page 26: ...22T 26 Figure 22 10 4 Pitch Servo 2 of 2 19 19 19 19 19 19 19 6 ELEVATOR CABLES REF NOTE BULKHEAD FS186 REF LEGEND 3 Screw 4 Washer 6 Nut 8 Bridle Cable 9 Bolt 19 Clamp 20 Bridle Cable End Fitting 21...

Page 27: ...roll servo to mounting bracket and remove roll servo from airplane 2 Disassembly GSM 86 Roll Servo Mount a Remove screws and washers securing stiffener ring to capstan cable guards b Remove cable gua...

Page 28: ...lb 1 13 0 23 Nm Refer to 20 60 4 Installation GSM 86 Roll Servo Mount a Position roll servo to mounting bracket and secure with bolts and washers b Torque bolts 35 0 5 0 in lb 3 95 0 56 Nm Refer to 20...

Page 29: ...re with bolts and nuts Torque nuts 50 5 in lb 5 6 0 6 Nm Refer to 20 60 j Position LH end of bridle cable and clamp assembly to LH aileron cable and loosely secure with bolts and nuts k While pushing...

Page 30: ...N REF BRACKET REF 2 8 9 3 11 12 1 3 8 14 LEGEND 1 Plug 2 Screw 3 Washer 4 Capstan 5 Nut 6 Clamp 7 Bridle Cable 8 Bolt 9 Star Washer 10 GSM 86 Roll Servo Mount 11 Stiffener Ring 12 Cable Guard 13 Retai...

Page 31: ...ts and washers securing yaw servo to mounting bracket and remove yaw servo from airplane 2 Disassembly GSM 86 Yaw Servo Mount a Remove screws and washers securing stiffener ring to capstan cable guard...

Page 32: ...rque bolt 35 0 5 0 in lb 3 95 0 56 Nm Refer to 20 60 d Install cable guards e Position stiffener ring to capstan cable guards and secure with screws and washers Torque screws 10 0 2 0 in lb 1 13 0 23...

Page 33: ...ecess h Ensure three wraps of bridle cable exist around capstan and that stop ball is in center of cable wrap when cable is at center of travel i Ensure that stop ball can not become disengaged from c...

Page 34: ...0 0 0 lb 11 3 0 9 0 0 kg o Using scale verify 20 1 rudder deflection angle p Remove rigging lockout pin from rudder actuation pulley in empennage q Ensure flight control systems operate through full r...

Page 35: ...lug 2 Screw 3 Washer 4 Capstan 5 Slip Clutch Cartridge 6 Clamp 7 Bridle Cable 8 Bolt RUDDER CABLE REF 7 11 9 3 8 3 8 1 13 8 3 6 15 NOTE Ensure bridle cable does not rub on cable guards 9 Star Washer 1...

Page 36: ...2 of 2 7 PULLEY REF 8 6 3 3 6 16 17 RUDDER CABLE REF 7 8 3 6 6 3 17 16 7 14 BRACKET REF BULKHEAD 222 REF BATTERY 2 SHELF REF ELT SHELF REF LEGEND 3 Washer 6 Clamp 7 Bridle Cable 8 Bolt 14 GSA 80 Serv...

Page 37: ...t completion the PFT annunciation will clear e To verify trim switches are operating correctly perform the following trim switch checks 1 On pilot s yoke momentarily actuate trim roll switch to the le...

Page 38: ...on power lever Verify TO is annunciated on PFD for both pitch and roll modes and command bars indicate a wings level pitch up attitude 11 Press FD on GMC 707 to deactivate Go Around mode and reset Fli...

Page 39: ...center 12 Press AP on GMC 707 to engage autopilot 13 Rotate pitch command wheel on GMC 707 down to command full NOSE DN 14 Hold yoke firmly and verify mis trim annunciation is displayed on PFD 15 Whil...

Page 40: ...nge of motion prior to initiating test If test must be stopped press AP DISC on yoke to disconnect autopilot See Figure 27 10 2 NOTE Flight control surfaces may need to be lockout pinned for automated...

Page 41: ...to zero NOTE Afterdataiscollectedandprocessed minimum and maximum torque readings from initial direction of test are displayed on PFD The servo immediately reverses direction and performs test in oppo...

Page 42: ...CHAPTER 22 10 GFC 700 AUTOMATED FLIGHT CONTROL SYSTEM CIRRUS AIRPLANE MAINTENANCE MANUAL MAINTENANCE PRACTICES MODELS SR22 AND SR22T 42 23 Dec 2016 Intentionally Left Blank...

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