W DOC AIRBUS | TSM A320F

Leak Detection from the Loop B in the Right Wing

TASK 36-22-00-810-878-A
Leak Detection from the Loop B in the Right Wing

1. Possible Causes
  • CABLE ASSY [76HF]
  • wiring
  • OVHT SENS ELEMENT [75HF]
  • OVHT SENS ELEMENT [79HF]
  • INTERCONNECTING CABLE [93HF]
  • SNSG ELEM-OVHT, R WING LOOP B [72HF]
  • SNSG ELEM-OVHT, R WING LOOP B [71HF]
  • SNSG ELEM-OVHT, R WING LOOP B [70HF]
  • SNSG ELEM-OVHT, R WING LOOP B [69HF]
  • CABLE-CONNECTING, R WING LOOP B [68HF]
  • CABLE-CONNECTING, R WING LOOP B [67HF]
  • SNSG ELEM-OVHT, R WING LOOP B [66HF]
  • SNSG ELEM-OVHT, R WING LOOP B [65HF]
  • SNSG ELEM-OVHT, R WING LOOP B [82HF]
  • CABLE-CONNECTING, R WING LOOP B [64HF]
  • duct
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
9240SI
1
CONTROLLER-LOOP
 B. Referenced Information
REFERENCE
DESIGNATION
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
AMM 36-11-48-000-003
Removal of the Bleed Air Ducts
AMM 36-11-48-400-004
Installation of the Bleed Air Ducts
AMM 36-11-48-790-802
Leak Check on Bleed Air Ducting in Wing Area between Bleed Air Precooler Wing Anti Ice Valve and Wing/Fuselage Connection
AMM 36-22-00-790-802
Leak Check on all the Bleed Air Ducts and Packs Components
ASM 362201
AMM 36-22-16-000-001
Removal of the Overheat Sensing Elements
AMM 36-22-16-000-002
Removal of the Cables
AMM 36-22-16-000-003
Removal of the Cables
AMM 36-22-16-000-004
Removal of the Overheat Sensing Elements
AMM 36-22-16-000-005
Removal of the Overheat Sensing Elements
AMM 36-22-16-000-006
Removal of the Overheat Sensing Elements
AMM 36-22-16-000-007
Removal of the Cables
AMM 36-22-16-400-001
Installation of the Overheat Sensing Elements
AMM 36-22-16-400-002
Installation of the Cables
AMM 36-22-16-400-003
Installation of the Cables
AMM 36-22-16-400-004
Installation of the Overheat Sensing Elements
AMM 36-22-16-400-005
Installation of the Overheat Sensing Elements
AMM 36-22-16-400-007
Installation of the Overheat Sensing Elements
AMM 36-22-16-400-008
Installation of the Cables
AMM 36-22-18-000-001
Removal of the Fuselage Overheat Sensing-Elements (Loop A and B)
AMM 36-22-18-400-001
Installation of the Fuselage Overheat Sensing-Elements (Loop A and B)
3. Fault Confirmation
Subtask 36-22-00-710-127-A ** ON A/C NOT FOR ALL
A. Test
NOTE: The overheat detection threshold is between 117 and 131 degrees Celsius.
An overheat detection by one loop can occur in these conditions:
  • High Outside Air Temperature (OAT).
  • ECS supplied with hot bleed air.
    In these conditions, the ambient air around the sensing elements can increase to the detection threshold but there is not an air leak.
    If there is an air leak, there will be an AIR L(R) WING LEAK warning on the ECAM.
    No other maintenance action is necessary if:
  • The overheat detection was by one loop only with high OAT and ECS supplied with hot bleed air.
  • The result of the BMC BITE test is TEST OK.
   (1) Do the BITE test of the EBAS AMM 36-11-00-740-802.
4. Fault Isolation
Subtask 36-22-00-810-148-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
R WING LOOP B
  • Remove BMC2 (1HA2) AMM 36-11-34-000-001.
  • On shelf 96VU, connect the 9240SI CONTROLLER-LOOP between connector 1HA2-AA/4F 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:
  • Disconnect the 9240SI CONTROLLER-LOOP from the BMC2 connector.
  • Install BMC2 (1HA2) AMM 36-11-34-400-001.
  • Refer to Para. 4.C.
  • Do a check of the correct installation of the sensing elements along the bleed duct.
  • Do a wiring check.
   (2) If the impedance is less than 10 kOhms:
  • Do a visual inspection of the sensing elements and cables on the R wing loop B.
     (a) If a sensing element or cable is damaged:

The elements that follow can be found in the FUSELAGE:
     (b) If no sensing element is damaged:
  • Disconnect the connector between sensing element 69HF (found in the wing) and cable 70HF (found in the wing).
  • Connect the 9240SI CONTROLLER-LOOP between BMC2 connector 1HA2-AA/4F and the ground.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
NOTE: You must use a dichotomy method to find the defective sensing element:
  • Disconnect a connector in the middle of the loop.
  • Measure the resistance of one of the halves.
    If the measurement is correct, you must do a check of the other half.
    If the measurement is not correct, do the same operation in the defective half again until you find the defective sensing element.
       1 If the impedance is less than 10 kOhms:
  • Disconnect the connector between sensing elements 79HF (found in the fuselage) and 93HF (found in the wing).
  • Do a check of the impedance read or the 9240SI CONTROLLER-LOOP.
         a If the impedance is less than 10 kOhms:
  • Disconnect the connector between sensing element 75HF and cable 76HF.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 kOhms:
    - Replace the CABLE ASSY [76HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
  • 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/4F of BMC2 (1HA2) and cable 76HF 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.C.

    ** 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.C.

    * If the impedance is more than 10 kOhms:
    - Disconnect the connector between sensing elements 75HF and 79HF.
    - Connect the connector between sensing element 75HF and cable 76HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 302 kOhms:
    - Replace the OVHT SENS ELEMENT [75HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - 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.C.

    ** If the impedance is more than 302 kOhms:
    - Disconnect the connector between sensing elements 79HF (found in the fuselage) and 93HF (found in the wing).
    - Connect the connector between sensing element 75HF and sensing element 79HF.
    - Do a check of the impedance read of the 9240SI CONTROLLER-LOOP.
    *** If the impedance is less than 10 kOhms:
    - Replace the OVHT SENS ELEMENT [79HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - 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.C.

    *** If the impedance is more than 10 kOhms:
    - Replace the INTERCONNECTING CABLE [93HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - 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.C.

The elements that follow can be found in the WING:
         b If the impedance is more than 10 kOhms:
  • Disconnect the connector between sensing element 72HF and 71HF.
  • Connect the connector between sensing elements 79HF (found in the fuselage) and 93HF (found in the wing).
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [72HF] AMM 36-22-16-000-001 and AMM 36-22-16-400-001.
    - 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.C.

    * If the impedance is more than 10 kOhms:
    - Disconnect the connector between sensing elements 71HF and 70HF.
    - Connect the connector between sensing elements 72HF and 71HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [71HF] AMM 36-22-16-000-006 and AMM 36-22-16-400-007.
    - 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.C.

    ** If the impedance is more than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [70HF] AMM 36-22-16-000-005 and AMM 36-22-16-400-005.
    - 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.C.
       2 If the impedance is more than 10 kOhms:
  • Disconnect the connector between cables 67HF and 66HF.
  • Connect the connector between sensing elements 69HF and 70HF.
  • 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 sensing elements 69HF and 68HF.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [69HF] AMM 36-22-16-000-004 and AMM 36-22-16-400-004.
    - 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.C.

    * If the impedance is more than 10 kOhms:
    - Disconnect the connector between sensing elements 68HF and cable 67HF.
    - Connect the connector between sensing elements 69HF and 68HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 10 kOhms:
    - Replace the CABLE-CONNECTING, R WING LOOP B [68HF] AMM 36-22-16-000-007 and AMM 36-22-16-400-008.
    - 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.C.

    ** If the impedance is more than 10 kOhms:
    - Replace the CABLE-CONNECTING, R WING LOOP B [67HF] AMM 36-22-16-000-003 and AMM 36-22-16-400-003.
    - 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.C.
         b If the impedance is more than 10 kOhms:
  • Disconnect the connector between sensing elements 65HF and 82HF.
  • Connect the connector between cables 67HF and 66HF.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 kOhms:
    - Disconnect the connector between sensing element 65HF and cable 66HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [66HF] AMM 36-22-16-000-005 and AMM 36-22-16-400-005.
    - 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.C.

    ** If the impedance is more than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [65HF] AMM 36-22-16-000-006 and AMM 36-22-16-400-007.
    - 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.C.

    * If the impedance is more than 10 kOhms:
    - Connect the connector between sensing elements 65HF and 82HF.
    - Disconnect the connector between sensing element 82HF and the cable 64HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 10 kOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP B [82HF] AMM 36-22-16-000-001 and AMM 36-22-16-400-001.
    - Connect all the cables or connectors disconnected.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install BMC2 (1HA2) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    ** If the impedance is more than 10 kOhms:
    - Replace the CABLE-CONNECTING, R WING LOOP B [64HF] AMM 36-22-16-000-002 and AMM 36-22-16-400-002.
    - 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/5F of BMC2 (1HA2) and cable 64HF 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.C.

    *** 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.C.
Subtask 36-22-00-810-149-A ** ON A/C NOT FOR ALL
B. If the test gives the TEST OK message:
Subtask 36-22-00-710-128-A ** ON A/C NOT FOR ALL
C. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:40:31 UTC
"AVIABRAIN" 2025