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AUTO switch is selected, or manually, if the respective APU/EXT switch is selected.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-22 FAA APPROVED
31 May 2000
APU OPERATING ENVELOPE IN-FLIGHT
See APU OPERATING ENVELOPE figure.
Guaranteed Starting: Running:
Altitude 15,000 ft. and below Altitude 30,000 ft. and below
Airspeed 250 KCAS Maximum Airspeed VMO/MMO Maximum
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-23
13 September 2000
3-04-30: APU Inflight Operation: Alternate Electrical Source – ELWS (Loadmeter)/ASC
420 Procedures:
FOR AIRPLANES SN 1156 AND SUBS. AND AIRPLANES SN 1000 THRU SN 1155 WITH
APU LOADMETER INSTALLED OR REMOVED BY ASC 420 AND SN 1430 AND SUB.
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 ELWS APU
ALTERNATOR ELECTRICAL LOAD ENVELOPE this Section.
NOTE: If flight is continued above 30,000 ft., the following Steps must be accomplished to
ensure continuous APU operation.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-24 FAA APPROVED
13 September 2000
If the Left Converter/Alternator is inoperative, complete Steps 8 thru 12.
8. Electric Master RIGHT Power............................................................................................. ON
9. Left AC Main APU/EXT........................................................................ON (Manually Select)
10. Right AC Main RIGHT ..........................................................................ON (Manually Select)
11. Left DC Main TRU/EXT........................................................................ON (Manually Select)
12. Right DC Main RIGHT ..........................................................................ON (Manually Select)
If Right Converter/Alternator is inoperative, complete Steps 13 thru 17.
13. Electric Master LEFT Power ............................................................................................... ON
14. Left AC Main LEFT ...............................................................................ON (Manually Select)
15. Right AC Main APU/EXT......................................................................ON (Manually Select)
16. Left DC Main LEFT ...............................................................................ON (Manually Select)
17. Right DC Main TRU/EXT......................................................................ON (Manually Select)
For either Converter/Alternator inoperative, continue:
18. Essential AC AUTO ............................................................................................................ ON
19. Essential DC AUTO ............................................................................................................ ON
20. Electrical Loadmeter (if installed) ....................................................................................... ON
21. Electrical Loadmeter Green Arc (if installed)...............................................................CHECK
FOR AIRPLANES SN 1430 AND SUB AND AIRPLANES WITH ASC 420
22. Windshield Heat ..............................................................................................AS REQUIRED
a. Left Converter Failed ................................................................................... RF/LS – OFF
b. Right Converter Failed ................................................................................. LF/RS – OFF
　
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