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(3)
If the fault continues:
-replace the VALVE-FAN AIR, ENG1 (9HA1) (Ref. AMM TASK 36-11-54-000-001) and (Ref. AMM TASK 36-11-54-400-001).
(4)
If the fault continues:
-replace the BMC-1 (1HA1) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
B. If the test gives the maintenance message FAN AIR-V 9HA1 OR THRM 7170HM1 OR SENSE LINE:
-do the trouble shooting procedure for the Fan Air Valve of the Engine 1 Blocked in the Closed Position (Ref. TSM TASK 36-11-00-810-847)
C. After the subsequent flight, make sure that the fault does not continue.
1
-EFF : ALL
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Fan Air Valve of the Engine 2 Blocked in the Open Position
1. Possible Causes_______________
-VALVE-FAN AIR, ENG2 (9HA2)
-BMC-2 (1HA2)
-THERMOSTAT-FAN AIR VALVE CTL (7170HM2)
-
wiring from the fan air valve (9HA2) to the BMC2 (1HA2)
-
wiring between pin A/3 of the fan air valve and the ground terminal
2. Job Set-up Information______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 36-11-34-000-001 Removal of the BMC (1HA1, 1HA2)
AMM 36-11-34-400-001 Installation of the BMC (1HA1, 1HA2)
AMM 36-11-43-000-001 Removal of the Fan Air Valve Control Thermostat (7170HM1, 7170HM2)
AMM 36-11-43-400-001 Installation of the Fan Air Valve Control Thermostat (7170HM1, 7170HM2)
AMM 36-11-54-000-001 Removal of the Fan Air Valve (9HA1,9HA2)
AMM 36-11-54-400-001 Installation of the Fan Air Valve (9HA1,9HA2)
TSM 36-11-00-810-848 Fan Air Valve of the Engine 2 Blocked in the Closed Position
3. Fault Confirmation__________________
A. Not applicable.
4. Fault Isolation_______________
A. If the fault symptom is identified by the maintenance message FAN AIR V 9HA2 OR THRM 7170HM2:
(1)
If the temperature regulation is abnormally low (less than 180.C during climb/cruise:
-replace the THERMOSTAT-FAN AIR VALVE CTL (7170HM2) (Ref. AMM TASK 36-11-43-000-001) and (Ref. AMM TASK 36-11-43-400-001).
(2)
If the fault continues:
-do a check and repair the wiring from the fan air valve (9HA2) to the BMC2 (1HA2), pins A/1 and A/5 to pins AA/12A and AA/13A.
(a) If the fault continues:
-do a check and repair the wiring between pin A/3 of the fan air valve and the ground terminal.
1
-EFF : ALL
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(3)
If the fault continues:
-replace the VALVE-FAN AIR, ENG2 (9HA2) (Ref. AMM TASK 36-11-54-000-001) and (Ref. AMM TASK 36-11-54-400-001).
(4)
If the fault continues:
-replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
B. If the test gives the maintenance message FAN AIR-V 9HA2 OR THRM 7170HM2 OR SENSE LINE:
-do the trouble shooting procedure for the Fan Air Valve of the Engine 2 Blocked in the Closed Position (Ref. TSM TASK 36-11-00-810-848)
C. After the subsequent flight, make sure that the fault does not continue.
1
-EFF : ALL
-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page A202
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Fan Air Valve of the Engine 1 Blocked in the Closed Position
1. Possible Causes
_______________
-THERMOSTAT-FAN AIR VALVE CTL (7170HM1)
-VALVE-FAN AIR, ENG1 (9HA1)
-
wiring from the fan air valve to the BMC1
-
wiring between pin A/3 of the fan air valve and the ground terminal
-
wiring
2. Job Set-up Information
______________________
A. Referenced Information
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