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12. APU Oil Pressure Low Light ................................................ON (10 SECONDS)
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................................................................................................WITHIN LIMITS
A. Maximum (0% - 60%)........................................................................988°C
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-04-00
Page 1
May 31/01
Revision 4
B. 60% - 100% During Start (Linear Decrease).....................821°C - 732°C
C. Maximum (Running) .........................................................................732°C
CAUTION
IF APU FAILS TO COME UP TO SPEED OR START
SWITCH LIGHT REMAINS ILLUMINATED, DEPRESS
OVERSPEEDTESTSWITCH. IFAPU STARTSWITCH
LIGHT STILL REMAINS ILLUMINATED, PLACE APU
MASTER SWITCH TO OFF AND ENSURE BATTERY
SWITCHES 1 AND 2 ARE SELECTED TO OFF.
18. Battery 1 and 2 Switches ................................................................................ON
WHEN BATTERY VOLTAGE IS ABOVE 17 VOLTS:
19. TRU Circuit Breaker (PDB, “AC RIGHT” Section) .................................CLOSE
20. Battery Volts / Amperes .......................................................................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, select appropriate Battery
switch to OFF and momentarily select the BATTERY
OVERRIDE switch to ON.
NOTE:
An undamaged, discharged battery will completely
recharge within approximately seventy-five (75)
minutes.
21. Appropriate Battery Switch.............................................................................ON
22. Battery Volts / Amperes .......................................................................MONITOR
23. APU AIR.........................................................................................AS REQUIRED
24. DC External Power.........................................................................DISCONNECT
05-04-20: APU Inflight Operation: Alternate Electrical Source
FOR SN 1000 THROUGH 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 an
electrical power source.
TO START APU IN FLIGHT:
1. Altitude / Airspeed .....................15,000 FT OR BELOW / 250 KCAS OR LESS
2. Battery 1 and 2 Switches ................................................................................ON
3. APU Fire Warning .....................................................................................CHECK
4. APU Master Switch ..........................................................................................ON
OPERATING MANUAL
05-04-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 2
May 31/01
Revision 4
5. APU Start Button .........................................................PRESS (MOMENTARILY)
CAUTION
APU STARTER IS LIMITED TOTHREE (3) CONSECUTIVE
START ATTEMPTS OF THIRTY (30) SECONDS
DURATION, 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 ................................................WITHIN LIMITATIONS
See limitations contained in Section 01-49-00: Auxiliary Power Unit (APU) and
observe load limitations shown in Figure 1: APU Alternator Electrical Load: SN
1000 Through 1155 Without APU Loadmeter.
With the APU operating and AUX PWR selected ON, constant frequency AC
power is available to power the MAIN AC busses; either automatically, if the
respective MAIN AC BUS AUTO switch is selected, or manually if the respective
MAIN AC BUS APU/EXT switch is selected.
APU OPERATING ENVELOPE IN FLIGHT:
See Figure 2: APU Operating Envelope: SN 1000 Through 1155 Without APU
Loadmeter.
Parameter: Guaranteed Starting: Running:
Altitude: 15,000 ft and below 30,000 ft and below
Airspeed: 250 KCAS maximum VMO/MMO maximum
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湾流4操作手册 Gulfstream IV Operating Manual 3(73)
