W DOC AIRBUS | TSM A320F

Leak Detection from the Loop A in the Right Wing

TASK 36-22-00-810-827-A
Leak Detection from the Loop A in the Right Wing

1. Possible Causes
  • CABLE-CONNECTING, R WING LOOP A [37HF]
  • wiring
  • SNSG ELEM-OVHT, R WING LOOP A [80HF]
  • SNSG ELEM-OVHT, R WING LOOP A [38HF]
  • SNSG ELEM-OVHT, R WING LOOP A [39HF]
  • CABLE-CONNECTING, R WING LOOP A [40HF]
  • CABLE-CONNECTING, R WING LOOP A [41HF]
  • SNSG ELEM-OVHT, R WING LOOP A [42HF]
  • SNSG ELEM-OVHT, R WING LOOP A [43HF]
  • SNSG ELEM-OVHT, R WING LOOP A [44HF]
  • SNSG ELEM-OVHT, R WING LOOP A [45HF]
  • OVHT SENS ELEMENT [74HF]
  • ELEMENT-OVERHEAT SENSING [47HF]
  • CABLE ASSY [48HF]
  • INTERCONNECTING CABLE [92HF]
  • 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 36-11-00-720-004
Leak Check of Engine Bleed Air Supply System and Packs Components through HPGC
AMM 36-11-00-720-005
Leak Check of Engine Bleed Air Supply System and Packs Components with APU Bleed Air
AMM 36-11-00-720-808
Leak Check of the RH Wing using Bleed Air from the opposite Engine 1
AMM 36-11-00-740-001
BITE Test of the BMC 1(2)
AMM 36-11-34-000-001
Removal of the BMC
AMM 36-11-34-400-001
Installation of the BMC
AMM 36-22-00-790-001
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)
F Component Location
F Table of Component Location
3. Fault Confirmation
Subtask 36-22-00-710-079-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 BMC1 AMM 36-11-00-740-001.
4. Fault Isolation
Subtask 36-22-00-810-077-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
R WING LOOP A
  • remove BMC1 (1HA1) AMM 36-11-34-000-001
  • on the shelf 95VU, connect the 9240SI CONTROLLER-LOOP between the connector 1HA1-AA/4D 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 BMC1 connector:
  • Install BMC1 (1HA1) AMM 36-11-34-400-001.
  • Refer to Para. 4.C.
  • Check the correct installation of sensing element along bleed duct.
  • Perform 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 A.
     (a) If a sensing element or cable is damaged:

The elements that follow can be found in the WING:
     (b) If no sensing element is damaged:
  • disconnect the connector between the sensing element 42HF and the cable 41HF
  • connect the 9240SI CONTROLLER-LOOP between the BMC1 connector 1HA1-AA/4D and the ground
  • do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
NOTE: You must use a dichotomic method to find the defective sensing element:
  • Disconnect a connector in the middle of a sensing line.
  • 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 the sensing elements 38HF and 39HF.
  • 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 the sensing elements 80HF and the cable 37HF
  • 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 A [37HF] AMM 36-22-16-000-002 and AMM 36-22-16-400-002
    - 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 the pin AA/4D of the BMC1 (1HA1) and the cable 37HF
    - connect all the cables or connectors disconnected
    - disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector
    - install the BMC1 (1HA1) 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - disconnect the connector between the sensing elements 80HF and 38HF
    - connect the connector between the sensing element 80HF and the cable 37HF
    - do a check of the impedance read on the 9240SI CONTROLLER-LOOP

    ** If the impedance is less than 131 KOhms:
    - replace the SNSG ELEM-OVHT, R WING LOOP A [80HF] 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 the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    ** If the impedance is more than 131 KOhms:
    - replace the SNSG ELEM-OVHT, R WING LOOP A [38HF] 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.
         b If the impedance is more than 10 KOhms:
  • disconnect the connector between the sensing element 39HF and 40HF
  • connect the connector between the sensing elements 38HF and 39HF
  • 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 A [39HF] 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - disconnect the connector between the cables 40HF and 41HF
    - connect the connector between the cable 40HF and the sensing element 39HF
    - 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 A [40HF] AMM 36-22-16-000-003 and AMM 36-22-16-400-003
    - connect all the cables or connectors disconnected
    - disconnet the 9240SI CONTROLLER-LOOP from the BMC1 connector
    - install the BMC1 (1HA1) 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 A [41HF] AMM 36-22-16-000-007 and AMM 36-22-16-400-007
    - connect all the cables or connectors disconnected
    - disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.
       2 If the impedance is more than 10 KOhms:
  • disconnect the connector between the sensing elements 44HF and 45HF
  • connect the connector between the sensing element 42HF and the cable 41HF
  • 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 the sensing elements 42HF and 43HF
  • 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 A [42HF] 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001,
    - refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - disconnect the connector between the sensing elements 43HF and 44HF
    - connect the connector between the sensing elements 42HF and 43HF
    - 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 A [43HF] 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 BMC1 connector
    - install the BMC1 (1HA1) 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 A [44HF] 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

The elements that follow can be found in the FUSELAGE:
         b If the impedance is more than 10 KOhms:
  • disconnect the connector between the sensing elements 74HF and 47HF
  • connect the connector between the sensing elements 44HF (found in the wing) and 45HF (found in the wing).
  • do a check of the impedance read on the 9240SI CONTROLLER-LOOP

    * If the impedance is less than 10 KOhms:
    - disconnect the connector between the sensing elements 45HF (found in the wing) and 74HF (found in the fuselage).
    - 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 A [45HF] (found in the wing) 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 the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    ** If the impedance is more than 10 KOhms:
    - replace the OVHT SENS ELEMENT [74HF] , 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    * If the impedance is more than 10 Kohms
    - connect the connector between the sensing elements 74HF and 47HF
    - disconnect the connector between the sensing element 47HF and the cable 48HF
    - do a check of the impedance read on the 9240SI CONTROLLER-LOOP

    ** If the impedance is less than 10 KOhms:
    - replace the ELEMENT-OVERHEAT SENSING [47HF] 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.

    ** If the impedance is more than 10 KOhms:
    - replace the CABLE ASSY [48HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001
    - 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 the pin AA/5D of the BMC1 (1HA1) and the cable 48HF
    - connect all the cables or connector disconnected
    - disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector
    - install the BMC1 (1HA1) 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 BMC1 connector
    - install the BMC1 (1HA1) AMM 36-11-34-400-001
    - refer to Para. 4.C.
Subtask 36-22-00-810-077-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
R WING LOOP A
  • Remove BMC1 (1HA1) AMM 36-11-34-000-001.
  • On shelf 95VU, connect the 9240SI CONTROLLER-LOOP between connector 1HA1-AA/4D 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 BMC1 connector.
  • Install BMC1 (1HA1) AMM 36-11-34-400-001.
  • Refer to Para. 4.C.
  • Check the correct installation of sensing element along bleed duct.
  • Perform 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 A.
     (a) If a sensing element or cable is damaged:

The elements that follow can be found in the WING:
     (b) If no sensing element is damaged:
  • Disconnect the connector between the sensing element 42HF and the cable 41HF.
  • Connect the 9240SI CONTROLLER-LOOP between connector 1HA1-AA/4D and the ground.
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.
NOTE: You must use a dichotomic method to find the defective sensing element:
  • Disconnect a connector in the middle of a sensing line.
  • 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 the sensing elements 38HF and 39HF.
  • 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 the sensing element 80HF and the cable 37HF.
  • 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 A [37HF] AMM 36-22-16-000-002 and AMM 36-22-16-400-002.
    - 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 the pin AA/4D of the BMC1 (1HA1) and the cable 37HF.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    ** If the impedance is more than 10 KOhms:
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - Disconnect the connector between the sensing elements 80HF and 38HF.
    - Connect the connector between the sensing element 80HF and the cable 37HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 131 KOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP A [80HF] AMM 36-22-16-000-001 and AMM 36-22-16-400-001.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    ** If the impedance is more than 131 KOhms:
    - Replace the SNSG ELEM-OVHT, R WING LOOP A [38HF] AMM 36-22-16-000-006 and AMM 36-22-16-400-007.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.
         b If the impedance is more than 10 KOhms:
  • Disconnect the connector between the sensing element 39HF and the cable 40HF.
  • Connect the connector between the sensing elements 38HF and 39HF.
  • 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 A [39HF] AMM 36-22-16-000-005 and AMM 36-22-16-400-005.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - Disconnect the connector between the cables 40HF and 41HF.
    - Connect the connector between the cable 40HF and the sensing element 39HF.
    - 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 A [40HF] AMM 36-22-16-000-003 and AMM 36-22-16-400-003.
    - Connect all the disconnected cables or connectors.
    - Disconnet the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) 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 A [41HF] AMM 36-22-16-000-007 and AMM 36-22-16-400-007.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.
       2 If the impedance is more than 10 KOhms:
  • Disconnect the connector between the sensing elements 44HF and 45HF.
  • Connect the connector between the sensing element 42HF and the cable 41HF.
  • 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 the sensing elements 42HF and 43HF.
  • 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 A [42HF] AMM 36-22-16-000-004 and AMM 36-22-16-400-004.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001,
    - Refer to Para. 4.C.

    * If the impedance is more than 10 KOhms:
    - Disconnect the connector between the sensing elements 43HF and 44HF.
    - Connect the connector between the sensing elements 42HF and 43HF.
    - 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 A [43HF] AMM 36-22-16-000-005 and AMM 36-22-16-400-005.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) 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 A [44HF] AMM 36-22-16-000-006 and AMM 36-22-16-400-007.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

The elements that follow can be found in the FUSELAGE:
         b If the impedance is more than 10 KOhms:
  • Disconnect the connector between the sensing element 47HF and the cable 92HF.
  • Connect the connector between the sensing elements 44HF (found in the wing) and 45HF (found in the wing).
  • Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    * If the impedance is less than 10 KOhms:
    - Disconnect the connector between the sensing elements 45HF (found in the wing) and 74HF (found in the fuselage).
    - 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 A [45HF] AMM 36-22-16-000-001 and AMM 36-22-16-400-001.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    ** If the impedance is more than 10 KOhms:
    - Disconnect the connector between the sensing element 74HF and the cable 92HF.
    - Connect the connector between the sensing elements 45HF and 74HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    *** If the impedance is less than 10 KOhms:
    - Replace the OVHT SENS ELEMENT [74HF] , AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    *** If the impedance is more than 10 KOhms:
    - Replace the INTERCONNECTING CABLE [92HF] .
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    * If the impedance is more than 10 Kohms:
    - Connect the connector between the sensing element 47HF and the cable 92HF.
    - Disconnect the connector between the sensing element 47HF and the cable 48HF.
    - Do a check of the impedance read on the 9240SI CONTROLLER-LOOP.

    ** If the impedance is less than 10 KOhms:
    - Replace the ELEMENT-OVERHEAT SENSING [47HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    ** If the impedance is more than 10 KOhms:
    - Replace the CABLE ASSY [48HF] AMM 36-22-18-000-001 and AMM 36-22-18-400-001.
    - Connect all the disconnected cables or connectors.
    - 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/5D of the BMC1 (1HA1) and the cable 48HF.
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.

    *** If the impedance is more than 10 KOhms:
    - Connect all the disconnected cables or connectors.
    - Disconnect the 9240SI CONTROLLER-LOOP from the BMC1 connector.
    - Install the BMC1 (1HA1) AMM 36-11-34-400-001.
    - Refer to Para. 4.C.
Subtask 36-22-00-810-085-A ** ON A/C NOT FOR ALL
B. If the test gives the TEST OK message:
Subtask 36-22-00-710-080-A ** ON A/C NOT FOR ALL
C. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:05 UTC
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