-remove the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-000-001)
- on the shelf 95VU, connect the LOOP CONTROLLER (9240SI) between the connector 1HA1-AA/5B and the ground (Ref. ASM 36-22/01)
-do a check of the impedance read on the LOOP CONTROLLER (9240SI).
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--May 01/04R ---CES -
(1)
If the impedance is more than 3 KOhms:
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-replace the BMC-1 (1HA1) which is removed (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
-refer to Para. 4.B.
(2)
If the impedance is less than 3 KOhms:
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-do a visual inspection of the sensing elements and cables on the engine 1 pylon loop.
(a)
If a sensing element or cable is damaged:
-replace the sensing element or cable (Ref. AMM TASK 36-22-15-000-001) and (Ref. AMM TASK 36-22-15-400-001)
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
(b)
If no sensing element is damaged:
-disconnect the connector between the cable 2HF1 and the sensing element 1HF1
-connect the LOOP CONTROLLER (9240SI) between the connector 1HA1-AA/5B and the ground
-do a check of the impedance read on the LOOP CONTROLLER (9240SI).
1_ If the impedance is less than 3 KOhms:
- replace the CABLE-CONNECTING, ENG 1 PYLON (2HF1) (Ref. AMM
TASK 36-22-15-000-001) and (Ref. AMM TASK 36-22-15-400-001)
- do a check of the impedance read on the LOOP CONTROLLER
(9240SI).
a If the impedance is less than 3 KOhms:
_
-do a check and repair the wiring between the pin AA/5B of the BMC1 (1HA1) and the cable 2HF1
-connect all the cables or connectors disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
b If the impedance is more than 3 KOhms:
_ -connect all the cables or connectors disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
2 If the impedance is more than 3 KOhms:
_
-disconnect the connector between the cable 3HF1 and the sensing element 1HF1
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--May 01/04 ---CES -
-connect the connector between the cable 2HF1 and the sensing element 1HF1
-do a check of the impedance read on the LOOP CONTROLLER (9240SI).
a_ If the impedance is less than 3 KOhms:
- replace the SNSG ELEM-OVHT, ENG 1 PYLON (1HF1)
- disconnect the LOOP CONTROLLER (9240SI) from the BMC
connector
- install the BMC-1 (1HA1) which is removed (Ref. AMM TASK
36-11-34-400-001)
- refer to Para. 4.B.
b If the impedance is more than 3 KOhms:
_ -replace the CABLE ASSY (3HF1)
-connect all the cables or connectors disconnected
-do a check of the impedance read on the LOOP CONTROLLER (9240SI) . if the impedance is less than 3 KOhms:
-do a check and repair the wiring between the pin AA/6B
of the BMC1 (1HA1) and the cable 3HF1
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1
connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
. if the impedance is more than 3 KOhms:
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1
connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
B. Do the test given in para. 3.
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--May 01/04 ---CES - Leak Detection on the Engine 2 Pylon
1. Possible Causes
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