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be transferred to the remaining FGC.
• Fail Passive: If, following a single FGC failure, the airplane is being controlled by
the second FGC and that second FGC should also fail, the autopilot will
disengage.
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-03-00
Page 1
May 31/00
Revision 0
05-03-40: Mach Trim Compensation Failure
IF MACH TRIM COMPENSATION RESULTS IN UNDESIRED ELEVATOR TRIM,
AND SELECTING THE OTHER FLIGHT GUIDANCE COMPUTER DOES NOT
CORRECT THIS CONDITION, PROCEED AS FOLLOWS:
1. PITCH TRIM Switch..........................................................................DISENGAGE
NOTE:
Since electric elevator trim is not available, the manual
trim wheel must be used.
2. MMO ............................................................................................LIMIT TO 0.75 MT
CAUTION
WHEN OBSERVING MMO OF 0.75 MT, CLOSELY
MONITOR AIRSPEED TO AVOID EXCEEDING 0.75
MT.
05-03-50: Yaw Damper Failure
The Yaw Damper is powered by the Flight Hydraulic System. If the right engine has
failed, but is still windmilling, Flight Hydraulic System pressure will remain at
approximately 3000 psi and will power the Yaw Damper. Should the right engine failure
prevent windmilling, the Yaw Damper should be selected off (YAW DAMP switch capsule
illuminated DISEN). If the Yaw damper is selected off, an amber YAW DAMPER OFF
message will be displayed on CAS. With Yaw Damper inoperative:
• Maximum fuel weight for takeoff is 9,000 lb (4082 kg).
• Above 18,000 ft, maintain at least 220 KCAS.
• Below 18,000 ft, maintain airspeed as a function of fuel quantity, at or above that
shown in the following table, until ready to configure for approach and landing.
Fuel Quantity - LB Minimum Airspeed - KCAS
8,000 96
10,000 107
12,000 117
14,000 126
16,000 135
18,000 143
20,000 151
22,000 158
24,000 165
26,000 172
28,000 178
30,000 184
OPERATING MANUAL
05-03-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 2
May 31/00
Revision 0
When Yaw Damper failure is coupled with failure of Mach Trim Compensation, observe
speed limitations for both failures and limit altitude to 41,000 ft.
NOTE:
If practical, land at fuel weight of less than 9,000 lb
(4082 kg). Landing at lower fuel weights will improve
dutch roll stability. Avoid flight into known areas of
moderate or greater turbulence.
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-03-00
Page 3
May 31/00
Revision 0
OPERATING MANUAL
THIS PAGE IS INTENTIONALLY LEFT BLANK.
05-03-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 4
May 31/00
AUXILIARY POWER SYSTEM
05-04-10: APU Starting On External DC Power
CAUTION
ENSURE AC EXTERNAL POWER IS DISCONNECTED.
1. Battery 1 and 2 Switches...............................................................................OFF
2. TRU Circuit Breaker (PDB, “AC RIGHT” Section) ....................................PULL
3. DC External Power...............................................................................CONNECT
4. Electric Master Auxiliary Power......................................................................ON
5. Battery Voltage .........................................................CHECK (ABOVE 4 VOLTS)
CAUTION
FOR AIRPLANES WITHOUT ASC 54: THE BATTERIES
MUST BE DEEP CYCLED PRIOR TO FLIGHT IF
BATTERY VOLTAGE IS BELOW 4 VOLTS. IF BATTERY
VOLTAGE IS BETWEEN 4 AND 20 VOLTS
PRIOR TO APU START, BATTERIES MUST BE DEEP
CYCLED AT NEXT AVAILABLE MAINTENANCE
FACILITY.
CAUTION
FOR AIRPLANES WITH ASC 54 AND BATTERY
VOLTAGE BELOW 4 VOLTS: THE BATTERIES MUST
BE DEEP CYCLED AT NEXT AVAILABLE
MAINTENANCE FACILITY AFTER USE OF THIS
PROCEDURE.
6. DC EXT PWR Indicator ....................................................................................ON
7. Battery Charger 1 and 2 CBs ..................................................VERIFY CLOSED
• Battery Charger 1: BATTERY CHARGER: PDB, “AC LEFT” Section
• Battery Charger 2: BATTERY CHARGER: PDB, “AC RIGHT” Section
8. HP Fuel Cocks..............................................................................................SHUT
9. APU Fire Warning .....................................................................................CHECK
10. APU Air ............................................................................................................OFF
11. APU Master Switch ..........................................................................................ON
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湾流4操作手册 Gulfstream IV Operating Manual 3(72)
