- ECB (59KD)
- aircraft wiring
- APU MAIN RELAY (4KD)
- C/B ECB SUPPLY (1KD)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-00-00-710-008 Operational Test of the APU (APS 3200) AMM 49-52-53-000-001 Removal of the PMG and Cooling Fan Assembly (8055KM) (APS 3200) AMM 49-52-53-400-001 Installation of the PMG and Cooling Fan Assembly (8055KM) (APS 3200) AMM 49-61-34-000-002 Removal of the Electronic Control Box (ECB) (59KD) (APS 3200) AMM 49-61-34-400-002 Installation of the Electronic Control Box (ECB)
(59KD) (APS 3200)
ASM 49-61/01
ASM 49-61/02
3. Fault Confirmation
__________________
A. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-008).
NOTE : This message is intermittent.
____ The ECB gives a LOSS OF DC POWER message if the electrical power stops for more than 230ms and then starts again.
4. Fault Isolation
_______________
A. Maintenance Action
(1) If the APU SHUTDOWNS report gives the maintenance message:
LOSS OF DC POWER:
APU Auto Shut Down Fault Code Number: 040
Additionally the Last Leg Report gives the maintenance message:
COOLING FAN PMG ASSY (8055KM)
Fault Code Number: 002
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page 206
Config-2 Aug 01/05 CES
- do a check and repair the wiring from the ECB (59KD) AC10/11 to the PMG/Cooling Fan Assy Connector P28/2, 3 (Ref. ASM 49-61/02).
(a) If the fault continues:
- do a test of the PMG fuse with a multimeter (diode scale):
- place the positive lead on PIN 3 of P28 Connector and the negative lead on PIN 2.
- if it is approx. 0.9V, the fuse is OK.
1 if the fuse is OK:
_
- replace the COOLING FAN/PMG ASSY (8053KM) (Ref. AMM TASK 49-52-53-000-001) and (Ref. AMM TASK 49-52-53-400-001).
a If the fault continues:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002).
2 if the fuse is blown:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002) and the COOLING FAN/PMG ASSY (8053KM) (Ref. AMM TASK 49-52-53-000-001) and (Ref. AMM TASK 49-52-53-400-001) at the same time.
(2) If the APU SHUTDOWNS report gives the maintenance message:
LOSS OF DC POWER:
APU Auto Shut Down Fault Code Number: 040
(a) if the fault is reproducible:
- check the ELEC messages in the Last-Leg Report on the MCDU, and do the related Trouble-shooting.
1 If the fault continues:
_
- do a check and repair the aircraft wiring between the ECB (59KD) AC7 and the APU MAIN RELAY (4KD) A-A1 (Ref. ASM 49-61/01).
a If the fault continues:
_
- do a check and repair the aircraft wiring between the APU MAIN RELAY (4KD) A-A2 and the C/B ECB SUPPLY (1KD) (Ref. ASM 49-61/01).
b If the fault continues:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002).
(b) If the fault is not reproducible:
- No maintenance action is necessary.
B. Do the test given in para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page 207
Config-2 Aug 01/05 CES
TASK 49-00-81-810-880
APU AUTO SHUT DOWN - NO ACCELERATION, APU Fuel Supply Failure (APS 3200)
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-22-00-810-801 APU Fuel System - Low Pressure AMM 49-00-00-710-008 Operational Test of the APU (APS 3200)
3. Fault Confirmation
__________________
A. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-008).
4. Fault Isolation
_______________
A. If the APU Last Leg Report gives the maintenance message:
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