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PROCEDURES
FAA APPROVED 3-19
31 May 2000
9. APU Fire Warning........................................................................................................CHECK
10. APU Air.............................................................................................................................OFF
11. APU Master Switch ............................................................................................................. ON
12. APU Oil Pressure Low Light........................................................................ ON (ten (10) sec.)
13. Left Main Fuel Boost Pump................................................................................................. ON
14. APU Start Button...................................................................................PRESS (Momentarily)
15. APU Oil Pressure Low Light.............................................................OUT (Before 95% RPM)
16. RPM......................................................................................................................... 100% ±3%
17. EGT.................................................................................................988° C Maximum (0-60%)
821° C to 732° C (60% to 100% during start (linear decrease)
732° C Maximum (Running)
CAUTION: IF APU FAILS TO COME UP TO SPEED OR START SWITCH LIGHT
REMAINS ILLUMINATED, DEPRESS OVERSPEED TEST SWITCH. IF APU
START SWITCH LIGHT STILL REMAINS ILLUMINATED, PLACE APU
MASTER SWITCH AND BATTERY SWITCHES 1 AND 2 OFF.
18. Battery 1 and 2 Switches...................................................................................................... ON
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-20 FAA APPROVED
31 May 2000
When battery voltage is above 17 volts:
19. TRU Circuit Breaker (UNDER "AC RIGHT" ON PDB)..............................................CLOSE
20. Battery Volts/Ammeters ..........................................................................................MONITOR
CAUTION: DELAY TAKEOFF UNTIL BATTERY CHARGERS COMPLETE CHARGE
CYCLES.
NOTE: For airplanes with ASC 54 - If charge current is not indicated for Battery 1 or 2, turn
appropriate battery switch OFF and momentarily turn the battery override switch on.
NOTE: An undamaged, discharged battery will completely recharge within approximately
seventy-five (75) minutes.
21. Appropriate Battery Switch ................................................................................................. ON
22. Battery Volts/Ammeter............................................................................................MONITOR
23. APU AIR..........................................................................................................AS REQUIRED
24. DC External Power ...........................................................................................DISCONNECT
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-21
31 May 2000
3-04-20: APU Inflight Operation: Alternate Electrical Source:
FOR SN 1000 THRU 1155 WITHOUT APU LOADMETER
In the event supplemental electrical power is required in-flight due to failure of an engine or
Alternator/Converter system, the APU Alternator may be used as a source.
To Start APU In Flight:
1. Descend to 15,000 ft. or below and reduce airspeed to 250 KCAS or less.
2. Battery 1 and 2 Switches...................................................................................................... ON
3. APU Fire Warning........................................................................................................CHECK
4. APU Master Switch ............................................................................................................. ON
5. APU Start Button.............................................................................................................PUSH
CAUTION: APU STARTER IS LIMITED TO THREE (3) CONSECUTIVE START
ATTEMPTS THIRTY (30) SECONDS ON, FOLLOWED BY TWENTY (20)
MINUTE COOL DOWN PERIOD. THEN, THREE (3) ADDITIONAL START
ATTEMPTS MAY BE MADE, AFTER WHICH A ONE (1) HOUR COOL
DOWN PERIOD MUST BE OBSERVED.
When APU is up to speed (100% +3%):
6. Electric Master Auxiliary Power ......................................................................................... ON
7. Auxiliary Power Loadings ....................See LIMITATIONS, Section 1, and figure titled APU
ALTERNATOR ELECTRICAL LOAD ENVELOPE, this Section.
With the APU operating and auxiliary power selected ON, constant frequency AC power is
available to power the Main AC busses; either automatically, if the respective Main AC Bus
　
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