A. If the test gives the maintenance message:
CONTACTOR 5KA:
with the LRU TROUBLE SHOOT DATA menu information
Fault Code Number: 124
- replace the CONTACTOR-MAIN START (5KA) (Ref. AMM TASK 49-42-55-000-001) and (Ref. AMM TASK 49-42-55-400-001).
(1) If the fault continues after the first flight on the subsequent day:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and (Ref. AMM TASK 49-61-34-400-001).
R **ON A/C 001-003, 051-099, 401-499,
B. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-004). NOTE : Make an entry in the applicable logbook that you must read the APU
____ CLASS 3 FAULTS after the first flight on the subsequent day.
TASK 49-40-00-810-802
Back-Up Start-Contactor Fault (GTCP 36-300)
1. Possible Causes
_______________
- CONTACTOR-BACK-UP START (10KA)
- ECB (59KD)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-00-00-710-004 Operational Test of the APU (4005KM) (GTCP 36-300)
AMM 49-42-55-000-001 Removal of the Start Contactors (5KA,10KA)
AMM 49-42-55-400-001 Installation of the Start Contactors (5KA,10KA)
AMM 49-61-34-000-001 Removal of the Electronic Control Box (ECB) (59KD)
(GTCP 36-300) AMM 49-61-34-400-001 Installation of the Electronic Control Box (ECB) (59KD) (GTCP 36-300)
3. Fault Confirmation
__________________
A. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-004).
4. Fault Isolation
_______________ **ON A/C 001-003, 051-062,
A. If the test gives the maintenance message:
CONTACTOR 10KA:
- replace the CONTACTOR-BACK-UP START (10KA) (Ref. AMM TASK 49-42-55-000-001) and (Ref. AMM TASK 49-42-55-400-001).
(1) If the fault continues after the first flight on the subsequent day:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and (Ref. AMM TASK 49-61-34-400-001).
R **ON A/C 063-099, 401-499,
A. If the test gives the maintenance message:
CONTACTOR 10KA:
with the LRU TROUBLE SHOOT DATA menu information:
Fault Code Number: 121
- replace the CONTACTOR-BACK-UP START (10KA) (Ref. AMM TASK 49-42-55-000-001) and (Ref. AMM TASK 49-42-55-400-001).
(1) If the fault continues after the first flight on the subsequent day:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and (Ref. AMM TASK 49-61-34-400-001).
R **ON A/C 001-003, 051-099, 401-499,
B. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-004). NOTE : Make an entry in the applicable logbook that you must read the APU
____ CLASS 3 FAULTS after the first flight on the subsequent day.
IGNITION AND STARTING ((131-9(A))) - FAULT ISOLATION PROCEDURES
_______________________________________________________________
TASK 49-40-00-810-807
Contactor (5KA) Fault (131-9(A))
1. Possible Causes
_______________
- MAIN START CONTACTOR SHOWS CLOSED
- CONTACTOR-MAIN START (5KA)
- ECB (59KD)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 49-00-00-710-010 Operational Test of the APU (131-9(A))
AMM 49-42-55-000-001 Removal of the Start Contactors (5KA,10KA)
AMM 49-42-55-400-001 Installation of the Start Contactors (5KA,10KA)
AMM 49-61-34-000-003 Removal of the Electronic Control Box (ECB)
(131-9(A)) AMM 49-61-34-400-003 Installation of the Electronic Control Box (ECB) (131-9(A))
3. Fault Confirmation
__________________
A. Read-out of the ECB Trouble Shooting Data
(1) Get access to the APU LAST LEG/PREVIOUS LEG report.
(2) Push the '>' adjacent to the related CFDS failure message:
- the MCDU menu shows:
MAIN START CONTACTOR SHOWS CLOSED
(3) Put the APU MASTER SW to the ON position.
(4) Get access to the APU GND SCANNING menu.
4. Fault Isolation
_______________
A. If the APU GND SCANNING menu gives the maintenance message:
CONTACTOR (5KA)
associated with Fault Code Number (FCN) 124
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