W DOC AIRBUS | TSM A320F

Failure of the Rudder Trim/Reset Circuit of the FAC 1

TASK 22-62-00-810-813-A
Failure of the Rudder Trim/Reset Circuit of the FAC 1

1. Possible Causes
  • FAC-1 [1CC1]
  • P/BSW-RUD TRIM/RESET [8CC]
  • wiring of the RUD TR RES NO MON discrete (from the FAC 1 (1CC1) to the RUD TRIM/RESET pushbutton switch (8CC))
  • wiring of the ground signal at RUD TRIM/RESET pushbutton switch (8CC)
  • wiring of the RUD TR RES NC COM discrete (from the FAC 1 (1CC1) to the RUD TRIM/RESET pushbutton switch (8CC))
  • wiring of the ground signal
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 22-66-34-000-002
Removal of the FAC
AMM 22-66-34-400-002
Installation of the FAC
AIPC 226708
ASM 226803
AMM 22-96-00-710-001
Operational Test of the AFS
3. Fault Confirmation
Subtask 22-62-00-710-076-A
A. Test
   (1) Do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FAC 1:
     (a) With the RUD TRIM/RESET pushbutton switch (8CC) pushed.
     (b) With the RUD TRIM/RESET pushbutton switch (8CC) released.
4. Fault Isolation
Subtask 22-62-00-810-072-A
A. If only the first test gives the maintenance message AFS : FAC1/RT RESET SW 8CC:
   (1) If the fault continues:
   (2) If the fault continues:
  • do a check of the wiring of the RUD TR RES NO MON discrete (from the FAC 1 (1CC1) to the RUD TRIM/RESET pushbutton switch (8CC)) ASM 226803.
     (a) If there is no continuity:
  • repair the above wiring.
     (b) If there is continuity:
  • do a check and repair the wiring of the ground signal at RUD TRIM/RESET pushbutton switch (8CC) (from pin 8 to the first terminal block) ASM 226803.
Subtask 22-62-00-810-073-A
B. If only the second test gives the maintenance message AFS : FAC1/RT RESET SW 8CC:
   (1) If the fault continues:
   (2) If the fault continues:
  • do a check of the wiring of the RUD TR RES NC COM discrete (from the FAC 1 (1CC1) to the RUD TRIM/RESET pushbutton switch (8CC)) ASM 226803.
     (a) If there is no continuity:
  • repair the above wiring.
     (b) If there is continuity:
  • do a check and repair the wiring of the ground signal at RUD TRIM/RESET pushbutton switch (8CC) (from pin 2 to the first terminal block) ASM 226803.
Subtask 22-62-00-810-074-A
C. If the two tests give the maintenance message AFS : FAC1/RT RESET SW 8CC:
  • do a check and repair the wiring of the ground signal from the ground point to the first terminal block ASM 226803.
Subtask 22-62-00-710-077-A
D. Do the tests given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:25:12 UTC
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