1HF2) AMM 36-22-15-400-001 Installation of the Pylon Overheat Sensing Element (1HF1, 1HF2) ASM 36-22/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operationnal test of the BMC2 (Ref. AMM TASK 36-11-00-740-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message:
ENG2 PYLON LOOP
-remove the BMC2 (1HA2) (Ref. AMM TASK 36-11-34-000-001)
- on the shelf 96VU, connect the LOOP CONTROLLER (9240SI) between the connector 1HA1-AA/6B and the ground (Ref. ASM 36-22/01)
-do a check of the impedance read on the LOOP CONTROLLER (9240SI).
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(1)
If the impedance is more than 3 KOhms:
-disconnect the LOOP CONTROLLER (9240SI) from the BMC2 connector
-replace the BMC-2 (1HA2) 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 BMC2 connector
-do a visual inspection of the sensing elements and cables on the engine 2 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 BMC2 connector
-install the BMC2 (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 2HF2 and the sensing element 1HF2
-connect the LOOP CONTROLLER (9240SI) between the connector 1HA2-AA/6B 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 2 PYLON (2HF2) (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/6B of the BMC2 (1HA2) and the cable 2HF2
-connect all the cables or connectors disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC2 connector
-install the BMC2 (1HA2) (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 BMC2 connector
-install the BMC2 (1HA2) (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 3HF2 and the sensing element 1HF2
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-connect the connector between the cable 2HF2 and the sensing element 1HF2
-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 2 PYLON (1HF2)
-disconnect the LOOP CONTROLLER (9240SI) from the BMC2 connector
-install the BMC-2 (1HA2) 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:
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