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16. RPM ............................................................................... 100% ±3%
Continued on next page →
Quick Reference Handbook
REVISION 7 ABNORMAL / EMERGENCY PROCEDURES
May 30/02 Page EA - 27
APU Starting on External DC Power, ctd… AFM 03-04-10
17. EGT ...................................................... 988° C MAXIMUM (0-60%)
821-732° C (60-100% DURING START [LINEAR DECREASE])
732° C MAXIMUM (RUNNING)
CAUTION: IF APU FAILS TO COME UP TO SPEED OR START
SWITCHLIGHT REMAINS ILLUMINATED, DEPRESS OVERSPEED
TEST SWITCH. IF APU START SWITCHLIGHT STILL REMAINS
ILLUMINATED, PLACE APU MASTER SWITCH AND BATTERY
SWITCHES 1 AND 2 OFF.
18. Battery 1 and 2 Switches............................................................ON
When battery voltage is above 17 volts:
19. TRU Circuit Breaker ( “AC RIGHT” Section Of 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
END
APU Inflight Operation - Alternate Electrical Source
AFM 3-04-20
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.
Continued on next page →
Quick Reference Handbook
ABNORMAL / EMERGENCY PROCEDURES REVISION 7
Page EA - 28 May 30/02
APU Inflight Operation - Alternate Electrical Source, ctd…
AFM 3-04-20
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 ............................................... OBSERVE
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 AUTO
switch is selected, or manually, if the respective APU / EXT switch
is selected. See the limitations that follow.
APU Operating Envelope (SN 1000 through 1155 without APU
Loadmeter):
Starting: 15,000 ft and below / 250 KCAS maximum
Running: 30,000 ft and below / VMO/MMO maximum
Load: SL to 22,000 ft: 100% (30 KVa)
22,000 to 30,000 ft: linear decrease to 50% (15 KVa)
END
Quick Reference Handbook
REVISION 7 ABNORMAL / EMERGENCY PROCEDURES
May 30/02 Page EA - 29
APU Inflight Operation -
ELWS (Loadmeter) / ASC 420 Procedures AFM 3-04-30
For airplanes SN 1156 and subs; airplanes SN 1000 thru SN 1155
with APU loadmeter installed or removed by ASC 420; SN 1430 and
subs.
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,
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