W DOC AIRBUS | TSM A320F

Leak Detection of the Engine 1 Pylon Loop B

TASK 36-22-00-810-884-A
Leak Detection of the Engine 1 Pylon Loop B

1. Possible Causes
  • BMC-2 [1HA2]
  • CABLE-CONNECTING, L PYLON LOOP B [102HF1]
  • wiring
  • SENSING ELEMENT-OVHT, L PYLON LOOP B [101HF1]
  • SENSING ELEMENT-OVHT, L PYLON LOOP B [106HF1]
  • CABLE-CONNECTING, L PYLON LOOP B [104HF1]
  • CABLE-CONNECTING, L PYLON LOOP B [105HF1]
  • CABLE-CONNECTING, L PYLON LOOP B [103HF1]
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
9240SI
1
CONTROLLER-LOOP
 B. Referenced Information
REFERENCE
DESIGNATION
ESPM 204422
AMM 36-11-00-740-802
BITE Test of the Engine Bleed Air System (EBAS) (System Test)
AMM 36-11-34-000-001
Removal of the BMC
AMM 36-11-34-400-001
Installation of the BMC
ASM 362201
AMM 36-22-15-000-802
Removal of the Pylon Overheat Sensing-Elements
AMM 36-22-15-000-803
Removal of the Pylon Overheat Sensing-Elements
AMM 36-22-15-400-802
Installation of the Pylon Overheat Sensing-Elements
AMM 36-22-15-400-803
Installation of the Pylon Overheat Sensing-Elements
3. Fault Confirmation
Subtask 36-22-00-710-137-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do the BITE test of the EBAS AMM 36-11-00-740-802.
4. Fault Isolation
Subtask 36-22-00-810-155-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
ENG1 PYLON LOOP B()
  • Remove BMC2 (1HA2) AMM 36-11-34-000-001.
  • On shelf 96VU, connect the 9240SI CONTROLLER-LOOP between connector 1HA2-AA/4E and the ground ASM 362201.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
   (1) If the impedance is more than 10 kOhms:
   (2) If the impedance is less than 10 kOhms:
  • Do a visual inspection of the sensing elements and cables on the engine 1 pylon loop B.
     (a) If a sensing element or cable is damaged:
     (b) If no sensing element is damaged:
  • Disconnect the connector between cable 102HF1 and sensing element 101HF1.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
       1 If the impedance is less than 10 kOhms:
  • Replace the CABLE-CONNECTING, L PYLON LOOP B [102HF1] ESPM 204422.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
         a If the impedance is less than 10 kOhms:
  • Do a check and repair the wiring between pin AA/4E of BMC2 (1HA2) and the cable 102HF1 ASM 362201.
  • Connect all the cables or connectors disconnected.
  • Disconnect the 9240SI CONTROLLER-LOOP from the BMC2 connector.
  • Install BMC2 (1HA2) AMM 36-11-34-400-001.
  • Refer to Para. 4.B.
         b If the impedance is more than 10 kOhms:
  • Connect all the cables or connectors disconnected.
  • Disconnect the 9240SI CONTROLLER-LOOP from the BMC2 connector.
  • Install BMC2 (1HA2) AMM 36-11-34-400-001.
  • Refer to Para. 4.B.
       2 If the impedance is more than 10 kOhms:
  • Disconnect the connector between cable 103HF1 and sensing element 106HF1.
  • Connect the connector between cable 102HF1 and sensing element 101HF1.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
         a If the impedance is less than 10 kOhms:
  • Disconnect the connector between cable 104HF1 and sensing element 101HF1.
  • Connect the connector between cable 103HF1 and sensing element 106HF1.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 17 kOhms:
    - Replace the SENSING ELEMENT-OVHT, L PYLON LOOP B [101HF1] AMM 36-22-15-000-803 and AMM 36-22-15-400-803.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC connector.
    - Install BMC-2 [1HA2] AMM 36-11-34-400-001.
    - Refer to Para. 4.B.

    * If the impedance is more than 17 kOhms:
    - Disconnect the connector between cable 105HF1 and sensing element 106HF1.
    - Connect the connector between cable 104HF1 and sensing element 101HF1.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is more than 10 kOhms:
    - Replace the SENSING ELEMENT-OVHT, L PYLON LOOP B [106HF1] AMM 36-22-15-000-802 and AMM 36-22-15-400-802.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC connector.
    - Install BMC-2 [1HA2] AMM 36-11-34-400-001.
    - Refer to Para. 4.B.

    ** If the impedance is less than 10 kOhms:
    - Replace the CABLE-CONNECTING, L PYLON LOOP B [104HF1] and CABLE-CONNECTING, L PYLON LOOP B [105HF1] ESPM 204422.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC connector.
    - Install BMC-2 [1HA2] AMM 36-11-34-400-001.
    - Refer to Para. 4.B.
         b If the impedance is more than 10 kOhms:
  • Replace the CABLE-CONNECTING, L PYLON LOOP B [103HF1] ESPM 204422.
  • Connect all the cables or connectors disconnected.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 kOhms:
    - Do a check and repair the wiring between pin AA/5E of BMC2 (1HA2) and cable 103HF1 ASM 362201.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC2 connector.
    - Install BMC2 (1HA2) AMM 36-11-34-400-001.
    - Refer to Para. 4.B.

    * If the impedance is more than 10 kOhms:
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC2 connector.
    - Install BMC2 (1HA2) AMM 36-11-34-400-001.
    - Refer to Para. 4.B.
Subtask 36-22-00-710-138-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:11 UTC
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