TASK 49-00-81-810-888
APU Flames at exhaust - Tail pipe fire (APS 3200)
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-00-00-710-008 Operational Test of the APU (APS 3200)
AMM 49-32-11-000-002 Removal of the Fuel Control Unit (8022KM) (APS 3200)
AMM 49-32-11-400-002 Installation of the Fuel Control Unit (8022KM) (APS
3200)
3. Fault Confirmation
__________________
A. Not applicable, the fault is evident.
4. Fault Isolation
_______________
A. Maintenance Action
(1) Make sure the VSB 4500001-49-87 is already incorporated.
- If not replace the Fuel Control Unit (FCU) (Ref. AMM TASK 49-32-11-000-002) (Ref. AMM TASK 49-32-11-400-002)
(2) Make sure the VSB 4500001-49-91 is already incorporated.
- If not perform the VSB and replace the Combustor-drain-valve .
B. Do the Test APU Operational Test (Ref. AMM TASK 49-00-00-710-008)
AIR INTAKE SYSTEM ((131-9(A))) - FAULT ISOLATION PROCEDURES
___________________________________________________________
TASK 49-16-00-810-802
Air-Intake Actuator Fault (131-9(A))
1. Possible Causes
_______________
- INLET FLAP SHOWS FLAP OPEN AND FLAP CLOSED
- INLET FLAP SHOWS FLAP OPEN SWITCH OPEN
- INLET FLAP SHOWS FLAP CLOSED SWITCH OPEN
- damage/contamination of the electrical connector 7527VC
- aircraft wiring
- AIR INTAKE FLAP ACTUATOR (4015KM)
- ECB (59KD)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-16-00-710-003 Operational Test of the Air Intake Flap and Diverter
(131-9(A)) AMM 49-16-51-000-003 Removal of the Air-Intake Flap Actuator (131-9(A)) AMM 49-16-51-400-003 Installation of the Air-Intake Flap Actuator
(131-9(A)) 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)) ASM 49-61/01
3. Fault Confirmation
__________________
A. Read-out of ECB Trouble Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU LAST LEG/PREVIOUS LEG report.
(3) Push the '>' adjacent to the related CFDS failure message:
- the MCDU menu shows INLET FLAP SHOWS FLAP OPEN AND FLAP CLOSED or INLET FLAP SHOWS FLAP OPEN SWITCH OPEN or INLET FLAP SHOWS FLAP CLOSED SWITCH OPEN
- do the Fault Confirmation that follows:
「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 : 001-049, 101-105, 107-107, 151-199, ∞∞49-16-00∞∞∞∞∞∞∞∞∞∞Page 201
201-210, Config-1 Aug 01/05 CES
(a) Do the test of the AIR INTAKE FLAP-ACTUATOR (Ref. AMM TASK 49-16-00-710-003).
(b) Get access to the APU GND SCANNING menu.
4. Fault Isolation
_______________
A. If the APU GND SCANNING menu gives the maintenance message:
AIR INLET FLAP ACTUATOR
associated with Fault Code Number (FCN) 60, 61, 62 or 63
- do a check for damage/contamination of the electrical connector 7527VC of the AIR INTAKE FLAP-ACTUATOR.
(1) If the electrical connector 7527VC is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector 7527VC is OK:
- do a check and repair of the aircraft wiring from the ECB (59KD) AC/5,4 to the electrical connector 7527VCA/J,K and the ECB (59KD) AB/G2,G3,G4,G5 to the electrical connector 7527VCA/D,C,E,B and the electrical connector 7527VCA/A,L,F, to GND (Ref. ASM 49-61/01).
(a) If the aircraft wiring is OK:
- replace the AIR INTAKE FLAP ACTUATOR (4015KM) (Ref. AMM TASK 49-16-51-000-003) and (Ref. AMM TASK 49-16-51-400-003).
(b) If the fault continues:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
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