W DOC AIRBUS | TSM A320F

Failure of the Fuel Flow Transmitter on Engine 2

TASK 73-31-00-810-806-A
Failure of the Fuel Flow Transmitter on Engine 2

1. Possible Causes
  • ECU [4000KS]
  • harness J13
  • fuel flow transmitter
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 73-21-50-000-012
Removal of the J13 Harness
AMM 73-21-50-000-046
Removal of the HJ13 Harness for SAC Engines
AMM 73-21-50-400-012
Installation of the J13 Harness
AMM 73-21-50-400-046
Installation of the HJ13 Harness for SAC Engines
AMM 73-21-60-000-001
Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001
Installation of the Electronic Control Unit (ECU)
ASM 732517
AMM 73-29-00-710-040
Operational Test of the FADEC on the ground (with Engine Motoring)
AMM 73-31-10-000-001
Removal of the Fuel Flow Transmitter
AMM 73-31-10-000-002
Removal of the Fuel Flow Transmitter
AMM 73-31-10-400-001
Installation of the Fuel Flow Transmitter
AMM 73-31-10-400-002
Installation of the Fuel Flow Transmitter
3. Fault Confirmation
Subtask 73-31-00-710-056-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 2A on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-31-00-810-055-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message FLOW SENS, J13, ECU:
  • do a check for open or short to ground at pins J13/1, 2, 3, 6 of the harness J13 between the ECU (4000KS) and the fuel flow transmitter ASM 732517.
   (1) If the wiring is not correct:
  • repair the above wiring.
   (2) If the wiring is correct:
  • disconnect the harness J13 from the ECU (4000KS) and do a check of the ECU resistance cable between:
    . pins 2 and 3 (60 to 90 Ohms)
    . pins 3 and 6 (140 to 210 Ohms)
    . pins 1 and 2 (> 10 Megohms)
    . pin 2 and ground (> 10 Megohms).
     (a) If the resistance values are in the specified limits:
     (b) If the resistance values are out of the specified limits:
  • disconnect the harness J13 from the fuel flow transmitter and do a check of the transmitter resistance between:
    . pins 1 and 2 (60 to 90 Ohms)
    . pins 2 and 3 (140 to 210 Ohms)
    . pins 1 and 4 (> 10 Megohms)
    . pins 1 and ground (> 10 Megohms).
       1 If the resistance values are in the specified limits:
       2 If the resistance values are out of the specified limits:
Subtask 73-31-00-810-055-C ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message FLOW SNSR, J13, ECU:
  • do a check for open or short to ground at pins J13/1, 2, 3, 6 of the harness J13 between the ECU (4000KS) and the fuel flow transmitter ASM 732517.
   (1) If the wiring is not correct:
  • repair the above wiring.
   (2) If the wiring is correct:
  • disconnect the harness J13 from the ECU (4000KS) and do a check of the ECU resistance cable between:
    . pins 2 and 3 (250 to 350 Ohms)
    . pins 3 and 6 (250 to 350 Ohms)
    . pins 1 and 2 (> 10 Megohms)
    . pin 2 and ground (> 10 Megohms).
     (a) If the resistance values are in the specified limits:
     (b) If the resistance values are out of the specified limits:
  • disconnect the harness J13 from the fuel flow transmitter and do a check of the transmitter resistance between:
    . pins 1 and 2 (250 to 350 Ohms)
    . pins 2 and 3 (250 to 350 Ohms)
    . pins 1 and 4 (> 10 Megohms)
    . pins 1 and ground (> 10 Megohms).
       1 If the resistance values are in the specified limits:
       2 If the resistance values are out of the specified limits:
Subtask 73-31-00-710-057-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:36:03 UTC
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