W DOC AIRBUS | TSM A320F

Landing Field Elevation Fault

TASK 21-31-00-810-811-A
Landing Field Elevation Fault

1. Possible Causes
  • LDG FIELD SELECTOR [20HL]
  • PRESS CONT 1 [11HL]
  • wiring
  • PRESS CONT 2 [12HL]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-31-00-710-002
Operational Test of the Pressure Control and Monitoring
ASM 213101
AMM 21-31-34-000-001
Removal of the Cabin Pressure Controller
AMM 21-31-34-400-001
Installation of the Cabin Pressure Controller
3. Fault Confirmation
Subtask 21-31-00-710-070-A
A. Test
   (1) Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.
   (2) Do a read-out of the CLASS 3 FAULTS report of the CPCS.
NOTE: If a fault is detected, the applicable report of the CPC shows a fault code for shop maintenance in addition to the related CFDS message(s). For detailed information see the applicable Page Block 301.
4. Fault Isolation
Subtask 21-31-00-810-072-A
A. If the test with the CPC 1 (11HL) gives the maintenance message LFES (50):
  • do a check of the LDG FIELD SELECTOR [20HL] and replace it if necessary ASM 213101.
   (1) If the fault continues:
   (2) If the fault moves with the CPC 1:
   (3) If the fault does not move with the CPC 1:
  • swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
  • do a check and repair the wiring between:
    CPC 1 connector (11HLAB) pins 7A and 8A and the FMS1,
    CPC 1 connector (11HLAB) pins 9A and 10A and the FMS2.
    ASM 213101.
Subtask 21-31-00-810-073-A
B. If the test with the CPC 2 (12HL) gives the maintenance message LFES (50):
  • do a check of the LDG FIELD SELECTOR [20HL] and replace it if necessary ASM 213101.
   (1) If the fault continues:
   (2) If the fault moves with the CPC 2:
   (3) If the fault does not move with the CPC 1:
  • swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
  • do a check and repair the wiring between:
    CPC 2 connector (12HLAB) pins 7A and 8A and the FMS1,
    CPC 2 connector (12HLAB) pins 9A and 10A and the FMS2,
    ASM 213101.
Subtask 21-31-00-710-071-A
C. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-31-00-860-060-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:24:42 UTC
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