TASK 49-00-00-810-872
APU Bleed Pressure - Intense Pressure Fluctuation (GTCP 36-300)
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 49-00-00-860-003 APU Start by External Power (GTCP 36-300)
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 49-00-00-860-003).
(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);
4. Fault Isolation
_______________
A. If the bleed indication on the ECAM APU page shows pressure fluctuation:
- switch to the ECAM BLEED page and observe the pack-flow indication needles.
(1) If one of them shows periodic cycling (low frequency, high amplitude):
- replace the respective VALVE-FLOW CTL (8HB) or VALVE-FLOW CTL (11HB) (Ref. AMM TASK 21-51-51-000-001) (Ref. AMM TASK 21-51-51-400-001).
「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 : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page B231
Config-1 Aug 01/05 CES (2) If the indication is OK:
- do the trouble shooting of APU bleed fluctuation (Ref. TASK 49-00-00-810-847).
B. Do the test given in para. 3.
TASK 49-00-00-810-965
APU Master Switch ON Legend inoperative
1. Possible Causes
_______________
- P/BSW-APU/MASTER SW (14KD)
- bulbs
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
33-14-00-810-801 Failure of One Annunciator Light Only AMM 33-14-00-710-001 Operational Test of the Annunciator Light Test System in the Cockpit ASM 49-61/01
3. Fault Confirmation
__________________
A. Test
(1) Push the APU Master SW p/bsw and check that the ON legend comes on.
(2) Release the APU Master SW p/bsw.
4. Fault Isolation
_______________
A. If the ON legend is off:
- do the Operational Test of the Annunciator Light Test System in the Cockpit (Ref. AMM TASK 33-14-00-710-001).
(1) If the fault continues:
- replace the bulbs.
(a) If the fault continues:
- do the trouble shooting of the anunciator light test system (Ref. TASK 33-14-00-810-801).
(2) If the Annunciator Light Test is OK:
- do a check for a GND signal at the APU Master SW p/bsw (14KD) A/C1 (Ref. ASM 49-61/01).
(a) If there is no GND signal:
- repair the aircraft wiring.
「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 : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page B233
Config-1 Aug 01/05 CES
(b) If there is a GND signal:
- replace the P/BSW-APU/MASTER SW (14KD).
B. Do the test given in para. 3.
TASK 49-00-00-810-966
APU Start Switch ON Legend inoperative
1. Possible Causes
_______________
- ECB (59KD)
- bulbs
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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