(4) Do a check and make sure that the flexible seals on the air intake system are in correct condition (Ref. AMM TASK 49-16-00-200-002) and clean.
(5) Clean the APU bleed air duct, the pneumatic ducts of the aircraft and the environmental control system (Ref. AMM TASK 21-00-00-615-001) or (Ref. AMM TASK 21-00-00-615-002) and (Ref. AMM TASK 21-00-00-100-001).
(6) Do the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) and make sure that you do not smell fumes in the cabin and/or there is no oil smoke at the APU exhaust.
(7) Do a leak check and make sure that there is no fuel leak and/or no oil leak on the APU and/or the APU generator.
NOTE : Do the leak check with a black light lamp.
____
「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 B240
201-210, Config-1 Aug 01/05 CES
TASK 49-00-81-810-884
APU AUTO SHUT DOWN - Shutdown in conjunction with Fuel Low Pressure (131-9(A))
1. Possible Causes
_______________
- FUEL PRESSURE SHOWS LOW DURING APU RUN
- air in the fuel
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
28-22-00-810-801 APU Fuel System - Low Pressure
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))
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
FUEL PRESSURE SHOWS LOW DURING APU RUN
(4) Purge the APU fuel-line to make sure that there is no air in the fuel (Ref. AMM TASK 28-22-00-710-001) .
(5) Start the APU and apply Bleed Air for 20 seconds, minimum (Ref. AMM TASK 49-00-00-860-008).
4. Fault Isolation
_______________
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
NO ACCELERATION (or) UNDERSPEED (or) NO FLAME
LOW FUEL PRESSURE
associated with the Fault Code Number (FCN) 100
- do the trouble shooting of the APU fuel system - low pressure (Ref. TASK 28-22-00-810-801).
「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 B241
201-210, Config-1 Aug 01/05 CES
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 : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B242
201-210, Config-1 Aug 01/05 CES
TASK 49-00-81-810-886
APU Bleed Pressure - Intense Pressure Fluctuation (131-9(A))
1. Possible Causes
_______________
- VALVE-FLOW CTL (8HB)
- VALVE-FLOW CTL (11HB)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-00-00-810-847 No APU Bleed-Air Pressure, Low or Fluctuating APU
Bleed-Air Pressure (GTCP 36-300)
AMM 21-51-51-000-001 Removal of the Pack Flow-Control Valve
AMM 21-51-51-400-001 Installation of the Pack Flow-Control Valve
AMM 49-00-00-860-008 APU Start by External Power (131-9(A))
3. Fault Confirmation
__________________
A. Test
NOTE : The Fault can be spurious and is not necessarily reproductive on
____
ground.
(1) Start and operate the APU (Ref. AMM TASK 49-00-00-860-008).
(2) On the AIR COND section on the overhead panel 30VU, push the
- APU BLEED p/bsw to on;
- PACK 1 p/bsw to on (the OFF legend is off);
- PACK 2 p/bsw to on (the OFF legend is off);
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