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2. Circuit Breakers ........................................................................................CHECK
3. Standby Attitude Indicator.......................................................................CAGED
4. EPMP Bus Switches (6) ..............................................................................AUTO
5. Battery 1 and 2 Switches ................................................................................ON
6. Exterior Lights ..............................................................................AS REQUIRED
7. Electric Master Auxiliary Power....................................................................OFF
8. APU Fire Warning .....................................................................................CHECK
9. APU Air ............................................................................................................OFF
10. APU Master Switch ..........................................................................................ON
11. APU Oil Pressure Low Light ................................................ON (10 SECONDS)
For airplanes SN 1156 and subsequent, check the following on first start of
the day:
A. APU Overspeed Test Switch..........................................................PRESS
B. APU RPM / Overspeed Indicators (Overhead Panel).............OBSERVE
The APU RPM indicator in the overhead panel shows a momentary
increase; the Overspeed LED momentarily illuminates.
NOTE:
The Overspeed LED will not illuminate in airplanes
with ASC 374 or SN 1310 and subsequent.
C. APU Oil Pressure Low Light ..............................................................OFF
D. APU Master Switch..............................................................................OFF
E. APU Master Switch................................................................................ON
F. APU Oil Pressure Low Light......................................ON (10 SECONDS)
12. Left Main Fuel Boost Pump ..............................................ON / MESSAGE OUT
13. APU Start Button .......................................................................................PRESS
14. APU Start Light ...................................................................OUT (BEFORE 60%)
15. APU Oil Pressure Low Light.....................................OUT (BEFORE 95% RPM)
16. RPM ......................................................................................................100% ± 3%
17. EGT................................................................................................WITHIN LIMITS
A. Maximum (0% - 60%)........................................................................988°C
B. 60% - 100% During Start (Linear Decrease).....................821°C - 732°C
OPERATING MANUAL
EXPANDED NORMAL PROCEDURES 03-02-00
Page 1
May 30/02
Revision 7
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 AND BATTERY SWITCHES 1 AND
2 OFF.
03-02-20: APU Operation
1. Electric Master Auxiliary Power .....................................................ON / CHECK
2. Battery Charger FAIL Lights .........................................................................OUT
3. Battery Amps......................................................................................CHARGING
NOTE:
If no charge is indicated on battery immediately after
start, battery charger failure may be indicated.
4. L / R ECS Pack Switches ................................................................................ON
5. APU Air.........................................................................ON / CHECK PRESSURE
NOTE:
Wait one (1) minute for EGT to stabilize before
selecting APU Air ON. After six (6) seconds, verify
ISOLATION valve is open. Maximum APU EGT with
air ON is 680°C.
03-02-30: APU Shutdown
1. Electric Master Auxiliary Power....................................................................OFF
2. APU Overspeed Test Button.......................................PRESS (MOMENTARILY)
Note overspeed indication.
3. APU Air ............................................................................................................OFF
NOTE:
APU Air switch position should not be changed just
prior to shutdown. After shutdown, wait until RPM
indicates less than 95% before changing APU Air
switch position.
OPERATING MANUAL
03-02-00 EXPANDED NORMAL PROCEDURES
Page 2
May 30/02
　
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