- 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.
a 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).
b If a force less than 30 lbf.ft (4.0674 m.daN) is necessary
_
to move the IGVs:
「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 : 063-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A257
Config-1 Aug 01/05 CES
- replace the IGV ACTUATOR (8014KM) (Ref. AMM TASK 49-23-51-000-002) and (Ref. AMM TASK 49-23-51-400-002).
c 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).
d If the fault continues:
_
- do a leak check of the aircraft bleed system.
R **ON A/C 001-003, 051-099, 401-499,
K. If: .the bleed pressure has small fluctuation of +/- 3 psig during MES motoring test,
NOTE : The N2 speed of the engine must be less than 25%.
____
NOTE : If there is a power interrupt in the aircraft electrical network,
____ the BMC can cause the ECB to cycle the load control valve to the close/open position. This also can cause a bleed pressure fluctuation. Do a RESET of the BMC.
.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 BLEED p/bsw are off,
- MES motoring test with one engine.
- do a check of the APU Bleed System for leaks.
(1) If there are leaks:
- replace or tighten as necessary.
(2) If there are no leaks:
- clean the surge control valve filter (Ref. AMM TASK 49-51-52-600-001).
(a) 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 test of the A/C bleed air system for leaks.
**ON A/C 001-003, 051-062,
L. If: .the bleed pressure has large fluctuation of +/- 20 psig during MES motoring test,
NOTE : The N2 speed of the engine must be less than 25%.
____
NOTE : Make sure that no other aircraft valves are open during the MES.
____
.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 BLEED p/bsw are off,
- MES motoring test with one engine.
- do a check of the APU compressor discharge pressure line and the air-flow sensor lines for leaks.
(1) If there are leaks:
- replace or tighten as necessary.
(2) If there are no leaks:
- clean the surge control valve filter (Ref. AMM TASK 49-51-52-600-001).
(a) If the fault continues:
- 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:
_
- replace the PNEUMATIC SENSOR ASSY (Ref. AMM TASK 49-51-13-000-001) and (Ref. AMM TASK 49-51-13-400-001).
a 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).
b If the fault continues:
_
- do a check of the electrical connectors for the surge control valve and the transducers for damage.
c 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).
「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, 051-062, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A259
Config-1 Aug 01/05 CESR **ON A/C 063-099, 401-499,
L. If: .the bleed pressure has large fluctuation of +/- 20 psig during MES motoring test,
NOTE : The N2 speed of the engine must be less than 25%.
____
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