- blockage of the APU inlet
- damage/leakage of the APU FUEL SYSTEM
- aircraft fuel-line of the APU-pump fuel-system.
- APU FUEL FILTER
- APU internal dammage
- FUEL CONTROL UNIT (P19)
- APU INLET PRESSURE TRANSDUCER (P22)
- SPEED SENSORS (P26)
- APU INLET TEMPERATURE SENSOR (P6)
- ECB (59KD)
- APU (4005KM)
- FUEL CONTROL UNIT (8022KM)
- APU INLET PRESSURE TRANSDUCER (8048KM)
- SPEED SENSORS (8060KM)
- APU INLET TEMPERATURE SENSOR (8010KM)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
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No specific ratchet
No specific socket
B. Referenced Information
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REFERENCE DESIGNATION
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AMM 28-22-00-710-001 Operational Test of the APU Fuel-Pump System on
Ground to Purge the Fuel Line AMM 49-00-00-860-008 APU Start by External Power (131-9(A)) AMM 49-11-11-000-004 Removal of the Power Plant (APU) (131-9(A)) AMM 49-11-11-400-004 Installation of the Power Plant (APU) (131-9(A)) AMM 49-23-14-000-001 Removal of the Sensor-APU Inlet Temperature (8010KM)
(131-9(A)) AMM 49-23-14-400-001 Installation of the Sensor-APU Inlet Temperature (8010KM) (131-9(A)) AMM 49-32-11-000-003 Removal of the Fuel Control Unit (FCU) (8022KM) (131-9(A))
「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, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page 210
201-210, Config-1 Aug 01/05 CES -------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-32-11-400-003 Installation of the Fuel Control Unit (FCU) (8022KM)
(131-9(A)) AMM 49-32-41-920-001 Replacement of the Fuel Filter (8028KM) (131-9(A)) AMM 49-51-21-000-001 Removal of the Transducer - APU Inlet Pressure
(8048KM) (131-9(A)) AMM 49-51-21-400-001 Installation of the Transducer - APU Inlet Pressure (8048KM) (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)) AMM 49-71-13-000-003 Removal of the Speed Sensors (8060KM) (131-9(A)) AMM 49-71-13-400-003 Installation of the Speed Sensors (8060KM) (131-9(A)) AMM 49-91-42-200-004 Inspection of the Magnetic- Drain Plug (8077KM)
(131-9(A))
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 SHUTDOWN report.
(3) Push the '>' adjacent to LRU DATA:
- the MCDU menu shows
NO LRU DETECTED
(4) Start the APU and apply Bleed Air for 20 seconds, minimum (Ref. AMM TASK 49-00-00-860-008).
4. Fault Isolation
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R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
UNDERSPEED
FCU/APU FUEL SUPPLY/APU ROTATION
associated with Fault Code Number (FCN) 204
- do a check for a blockage of the APU inlet
「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, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page 211
201-210, Config-1 Aug 01/05 CES (1) If the fault continues:
- do a check for damage/leakage of the APU FUEL SYSTEM.
(a) If there is damage/leakage in the APU FUEL SYSTEM:
- do a repair.
(b) If the APU FUEL SYSTEM is OK:
- purge the aircraft fuel-line of the APU-pump fuel-system. (Ref. AMM TASK 28-22-00-710-001).
1 If the fault continues:
_
- replace the APU FUEL FILTER (Ref. AMM TASK 49-32-41-920-001).
2 If the fault continues:
_
- do a check for APU internal dammage:
- do check for contamination of the MAGNETIC-DRAIN PLUG (Ref. AMM TASK 49-91-42-200-004).
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