BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
H56672
FROM SHEET 2 (BLOCK 5)
YES
YES
NO
6
DID THE "OVERSPEED" SHUT-
23 MEASURE THE RESISTANCE AT
DOWN OCCUR IN LESS THAN THE TACHOMETER GENERATOR,
30 SECONDS FROM THE TIME THE CONNECTOR D1262, FROM PIN A TO
APU IS STARTED? PIN B (WDM 49-41-01).
IS THE RESISTANCE
NO
15-35 OHMS?
YES 49-41-01).
YES
24 REPLACE THE FUEL CONTROL
UNIT (AMM 49-31-11/401).
START AND OPERATE THE APU (AMM 49-11-00/201).
DID THE APU START AND OPERATE CORRECTLY?
NO
61 REPLACE THE APU (AMM 49-11-00/401).
OVERSPEED Light Is On when the APU Master Switch Is in the OFF Position Figure 102 (Sheet 3)
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H55464
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201)
APU INDICATION LIGHTS ON THE P5 FORWARD OVERHEAD PANEL DO NOT COME ON WITH THE PRESS-TO-TEST
POSSIBLE CAUSES:
1.
LIGHT BULB
2.
LAMP ASSEMBLY.
FAULT ISOLATION:
YES
1 FOR EACH APU INDICATION
LIGHT THAT DID NOT COME ON, DO
A CHECK OF THE LIGHT BULB.
IS THE LIGHT BULB OK?
APU Indication Lights on the P5 Forward Overhead Panel
Do Not Come On with the Press-To-Test
Figure 103
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BATTERY VOLTAGE IS PREREQUISITES
LESS THAN 22 VOLTS MAKE SURE THIS SYSTEM WILL OPERATE:
WITH THE "BAT" SWITCH APU (AMM 49-11-00/201)
IN THE "ON" POSITION MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION:
AND NO AC POWER ON ELECTRICAL POWER IS ON (AMM 24-22-00/201)
THE CHARGER
POSSIBLE CAUSES:
1.
BATTERY PROBLEM (AMM 24-31-11/201)
2.
BATTERY LOW ON CHARGE.
FAULT ISOLATION:
NO
1 START THE APU
(AMM 49-11-00/201).
NOTE:DO NOT TRY TO START THE APU MORE THAN ONE TIME WITH THE BATTERY VOLT-AGE LESS THAN 22V.
DID THE APU START?
YES
NO
21 SUPPLY EXTERNAL ELECTRICAL
POWER (AMM 24-22-00/201) AND
FULLY CHARGE THE BATTERY.
DID THE BATTERY VOLTAGE INCREASE TO MORE THAN 22V?
YES
53 OPERATE THE APU WITH THE "APU GEN" SWITCHES ON THE P5 FORWARD OVERHEAD PANEL IN THE "ON" POSITION UNTIL THE BATTERY IS FULLY CHARGED.
NOTE:WHEN THE BATTERY IS FULLY CHARGED, THE CHARGER SENDS A SERIES OF SHORT PULSES TO THE POSITIVE SIDE OF THE "DC AMPS" METER.
Battery Voltage is Less Than 22 Volts with the BAT Switch in the
ON Position and No AC Power on the Charger
Figure 104
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201)
BATTERY VOLTAGE IS LESS THAN 26 VOLTS WITH AC POWER ON THE CHARGER
POSSIBLE CAUSES:
1.
BATTERY PROBLEM (AMM 24-31-11/201)
2. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 AIRBORNE AUXILIARY POWER 1(14)
