- do the related trouble shooting procedure.
2 If the test is OK:
_
- do a leak check of the aircraft bleed system.
**ON A/C 001-003, 051-062,
H. If:
.the bleed pressure is low with both engines in operation,
.the bleed pressure is normal with packs in operation,
.the APU self test gives no maintenance message.
NOTE : Aircraft configuration:
____
- the PACK 1 and 2 p/bsw are OFF,
- the APU BLEED valve p/bsw is ON,
- both engines in operation.
(1) If the fault continues:
- do a leak check of the aircraft bleed system.
- remove the IGV ACTUATOR P21 (Ref. AMM TASK 49-23-51-000-002).
- do a push/pull test on the IGVs to check the IGV movement. .make sure that the IGV has a travel range of 1 in. (25.3999 mm), .measure the force of the IGV movement.
「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 A255
Config-1 Aug 01/05 CES
(2) If a force less than 30 lbf.ft (4.0674 m.daN) is necessary to move the IGVs:
- replace the IGV ACTUATOR P21 (Ref. AMM TASK 49-23-51-000-002) and (Ref. AMM TASK 49-23-51-400-002).
(3) If a force more than 30 lbf (13.3446 daN) is necessary to move the IGVs or the travel range is less than 1 in. (25.3999 mm):
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-001) and (Ref. AMM TASK 49-11-11-400-001).
J. If: .the bleed pressure is low with both engines in operation, .the bleed pressure is also low in ECS mode, .the APU self test gives no maintenance message.
- check the load control valve position during the APU operation.
(1) If the load control valve is not fully open:
- replace the LOAD CONTROL VALVE P12 (Ref. AMM TASK 49-51-51-000-001) and (Ref. AMM TASK 49-51-51-400-001).
(2) If the load control valve is fully open:
- do a check of the APU compressor discharge pressure line and the air-flow sensor lines for leaks.
(a) If there are leaks:
- replace or tighten as necessary.
(b) If there are no leaks:
- clean the surge control valve filter (Ref. AMM TASK 49-51-52-600-001).
1_ If the fault continues:
- replace the PNEUMATIC SENSOR ASSY (Ref. AMM TASK 49-51-13-
000-001) and (Ref. AMM TASK 49-51-13-400-001).
2_ If the fault continues:
- replace the SURGE CONTROL VALVE P18 (Ref. AMM TASK 49-51-52-
000-002) and (Ref. AMM TASK 49-51-52-400-002).
3_ If the fault continues:
- do a check of the electrical connectors for the SURGE
CONTROL VALVE P18 and the transducers for damage.
4_ If the fault continues:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and
(Ref. AMM TASK 49-61-34-400-001).
5_ If the fault continues:
- do a leak check of the aircraft bleed system.
R **ON A/C 063-099, 401-499,
J. If:
.the bleed pressure is low with both engines in operation,
.the bleed pressure is also low in ECS mode,
.the APU self test gives no maintenance message.
- check the load control valve position during the APU operation.
(1) If the load control valve is not fully open:
- replace the LOAD CONTROL VALVE (8051KM) (Ref. AMM TASK 49-51-51-000-001) and (Ref. AMM TASK 49-51-51-400-001).
(2) If the load control valve is fully open:
- do a check of the APU compressor discharge pressure line and the air-flow sensor lines for leaks.
(a) If there are leaks:
- replace or tighten as necessary.
(b) If there are no leaks:
- clean the surge control valve filter (Ref. AMM TASK 49-51-52-600-001).
1 If the fault continues:
_
- replace the PNEUMATIC SENSOR ASSY (8039KM) (Ref. AMM TASK 49-51-13-000-001) and (Ref. AMM TASK 49-51-13-400-001).
2 If the fault continues:
_
- replace the SURGE CONTROL VALVE (8058KM) (Ref. AMM TASK 49-51-52-000-002) and (Ref. AMM TASK 49-51-52-400-002).
3 If the fault continues:
_
- do a check of the electrical connectors for the SURGE CONTROL VALVE (8058KM) P18 and the transducers for damage.
4 Remove the IGV ACTUATOR (8014KM) (Ref. AMM TASK 49-23-51-000-
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本文链接地址：A320 Trouble Shooting Manual 排故手册 机载辅助动力 1(56)
