W DOC AIRBUS | TSM A320F

IGV-Actuator (P21) Fault (131-9(A))

TASK 49-00-81-810-858-A
IGV-Actuator (P21) Fault (131-9(A))

1. Possible Causes
  • IGV LVDT PRIMARY SHOWS OPEN CIRCUIT
  • IGV LVDT SECONDARY SHOWS OPEN CIRCUIT
  • IGV LVDT EXCITATION CIRCUIT FAILURE
  • damage/contamination of electrical connector P21
  • IGV ACTUATOR (P21)
  • aircraft wiring
  • ELECTRONIC CONTROL BOX [59KD]
  • IGV ACTUATOR (8014KM)
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
AMM 49-23-51-000-004
Removal of the Inlet Guide Vane - Actuator (131-9(A))
AMM 49-23-51-400-004
Installation of the Inlet Guide Vane - Actuator (131-9(A))
ASM 496104
AMM 49-61-34-000-003
Removal of the Electronic Control Box (ECB) (131-9(A))
AMM 49-61-34-400-003
Installation of the Electronic Control Box (ECB) (131-9(A))
3. Fault Confirmation
Subtask 49-00-81-710-066-A ** ON A/C NOT FOR ALL
A. Read-out of ECB Trouble-Shooting Data
   (1) Put the APU MASTER SW to the ON position.
   (2) Get access to the APU LAST LEG/PREVIOUS LEG report.
   (3) Push the '>' adjacent to the related CFDS failure message:
  • the MCDU menu shows:
    IGV LVDT PRIMARY SHOWS OPEN CIRCUIT
    or
    IGV LVDT SECONDARY SHOWS OPEN CIRCUIT
    or
    IGV LVDT EXCITATION CIRCUIT FAILURE
   (4) Get access to the APU GND SCANNING menu.
4. Fault Isolation
Subtask 49-00-81-810-060-A ** ON A/C NOT FOR ALL
A. If the APU GND SCANNING menu gives the maintenance message:

IGV ACTUATOR P21

associated with Fault Code Number (FCN) 81

  • do a check for damage/contamination of electrical connector P21 of the IGV ACTUATOR (P21).
   (1) If the electrical connector P21 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin 1 and pin 6 of the IGV ACTUATOR (P21).
     (a) If the resistance value is not between 122 Ohms and 150 Ohms:
     (b) If the resistance value is between 122 Ohms and 150 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/E8,E9 to the IGV ACTUATOR (P21) P21/1,6 ASM 496104.
       1 If the fault continues:
Subtask 49-00-81-810-061-A ** ON A/C NOT FOR ALL
B. If the APU GND SCANNING menu gives the maintenance message:

IGV ACTUATOR P21

associated with Fault Code Number (FCN) 82

  • do a check for damage/contamination of electrical connector P21 of the IGV ACTUATOR (P21).
   (1) If the electrical connector P21 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across:
    . pin 2 and pin 5 of the IGV ACTUATOR (P21),
    . pin 2 and pin 3 of the IGV ACTUATOR (P21),
    . pin 3 and pin 5 of the IGV ACTUATOR (P21),
     (a) If the resistance is not between:
47 Ohms and 59 Ohms (pin 2-5)
or
47 Ohms and 59 Ohms (pin 2-3)
or
95 Ohms and 117 Ohms (pin 3-5)
     (b) If the resistance is between:
47 Ohms and 59 Ohms (pin 2-5)
and
47 Ohms and 59 Ohms (pin 2-3)
and
95 Ohms and 117 Ohms (pin 3-5)
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/E11,E12,C2 to the IGV ACTUATOR (P21) P21/5,3,2 ASM 496104.
       1 If the fault continues:
Subtask 49-00-81-810-060-B ** ON A/C NOT FOR ALL
C. If the APU GND SCANNING menu gives the maintenance message:

IGV ACTUATOR (8014KM)

associated with Fault Code Number (FCN) 81

  • do a check for damage/contamination of electrical connector P21 of the IGV ACTUATOR (8014KM).
   (1) If the electrical connector P21 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin 1 and pin 6 of the IGV ACTUATOR (8014KM).
     (a) If the resistance value is not between 122 Ohms and 150 Ohms:
     (b) If the resistance value is between 122 Ohms and 150 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/E8,E9 to the IGV ACTUATOR (8014KM) P21/1,6 ASM 496104.
       1 If the fault continues:
Subtask 49-00-81-810-061-B ** ON A/C NOT FOR ALL
D. If the APU GND SCANNING menu gives the maintenance message:

IGV ACTUATOR (8014KM)

associated with Fault Code Number (FCN) 82

  • do a check for damage/contamination of electrical connector P21 of the IGV ACTUATOR (8014KM)
   (1) If the electrical connector P21 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance to do a resistance check accross
    . pin 2 and pin 5 of the IGV ACTUATOR (P21).
    . pin 2 and pin 3 of the IGV ACTUATOR (P21).
    . pin 3 and pin 5 of the IGV ACTUATOR (P21).
     (a) If the resistance is not between:
47 Ohms and 59 Ohms (pin 2-5)
or
47 Ohms and 59 Ohms (pin 2-3)
or
95 Ohms and 117 Ohms (pin 3-5)
     (b) If the resistance is between:
47 Ohms and 59 Ohms (pin 2-5)
and
47 Ohms and 59 Ohms (pin 2-3)
and
95 Ohms and 117 Ohms (pin 3-5)
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/E11,E12,C2 to the IGV ACTUATOR (8014KM) P21/5,3,2 ASM 496104.
       1 If the fault continues:
Subtask 49-00-81-810-177-C ** ON A/C NOT FOR ALL
E. If the APU GND SCANNING menu gives the maintenance message:
IGV ACTUATOR (8014KM)
ECB (59KD)
associated with Fault Code Number (FCN) 80

  • do a check for damage/contamination of electrical connector P21 of the IGV ACTUATOR (8014KM)
   (1) If the electrical connector P21 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin 1 and pin 6 of the IGV ACTUATOR (8014KM).
     (a) If the resistance value is not between 122 Ohms and 150 Ohms (pin 1-6):
     (b) If the resistance value is between 122 Ohms and 150 Ohms (pin 1-6):
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/E8,E9 to the IGV ACTUATOR (8014KM) P21/1,6 ASM 496104.
       1 If the fault continues:
Subtask 49-00-81-710-067-A ** ON A/C NOT FOR ALL
F. Do a check of the APU GND SCANNING menu to verify the fault is not present.
[Rev.8 from Aug 2018] 2026.04.04 04:40:38 UTC
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