W DOC AIRBUS | TSM A320F

Loss of the ELAC 1 COM BUS 1 or ELAC 1 MON BUS 1 Signal for the ELAC 1

TASK 27-93-00-810-966-A
Loss of the ELAC 1 COM BUS 1 or ELAC 1 MON BUS 1 Signal for the ELAC 1

NOTE: If the fault appears at electrical power up, for the ELAC with the PN 3945128209 or PN 394512821x or PN 39451291xx series, do the TSM TASK 27-93-00-810-964 (ELAC FAULT at Electrical Power Up).
1. Possible Causes
  • ELAC-1 [2CE1]
  • wiring of the DGI 01 signal from the ELAC 1 (2CE1) COM part and MON part to the first terminal block
  • wiring of the DSI 48 signal from the ELAC1 (2CE1) COM part and MON part to the first terminal block
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 31-32-00-810-934-A
Failure of the Digital Links
ESPM 2052220
ASM 279249
ASM 279250
AMM 27-93-34-000-001
Removal of the ELAC
AMM 27-93-34-400-001
Installation of the ELAC
AMM 27-96-00-740-001
BITE Test of the EFCS (Ground Scanning)
3. Fault Confirmation
Subtask 27-93-00-740-204-A
A. Test
   (1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-93-00-810-244-A
A. If the test gives the maintenance message:
ELAC1 COM BUS 1
or
ELAC1 MON BUS 1
   (1) If the fault continues:
   (2) If the fault continues:
  • at the ELAC1 receptacle, do a check of the insulation of the wiring of the DGO 01 signal ASM 279250 ESPM 2052220.
   (3) If the fault continues:
     (a) Do a check of the wiring of the DGI 01 signal from the ELAC 1 (2CE1) COM part and MON part to the first terminal block ASM 279250.
  • if there is continuity, see Para. (b)
  • if there is no continuity, repair the above wiring.
     (b) Do a check and repair the wiring of the DSI 48 signal from the ELAC1 (2CE1) COM part and MON part to the first terminal block ASM 279249.
5. Close-up
Subtask 27-93-00-740-205-A
A. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:28:09 UTC
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