DOC AIRBUS | TSM A320FFailure of the Circuit of the Rudder Trim-Control Switch of the FAC 1
TASK 22-62-00-810-801-A
Failure of the Circuit of the Rudder Trim-Control Switch of the FAC 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-62-00-710-050-A
Subtask 22-62-00-810-050-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:11 UTC
Failure of the Circuit of the Rudder Trim-Control Switch of the FAC 1
1. Possible Causes
- FAC-1 [1CC1]
- CTL SW-RUDDER TRIM [9CC]
wiring of the RUD TR R NC SW COM and RUD TR L NC SW COM discretes from the FAC 1 (1CC1) to the rudder trim-control switch (9CC) wiring of the RUD TR R NO SW MON or RUD TR L NO SW MON discretes from the FAC 1 (1CC1) to the rudder trim-control switch (9CC) wiring of the ground signal at the rudder trim control switch (9CC)
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 |
| ASM 226803 | |
| AMM 22-96-00-710-001 | Operational Test of the AFS |
Subtask 22-62-00-710-050-A
A. Test
(1) Do the operational test of the AFS without rudder trim control switch (9CC) operation AMM 22-96-00-710-001 and read the result for the FAC 1.
(2) Do the operational test of the AFS (turn the rudder trim-control switch (9CC) in one direction) AMM 22-96-00-710-001 and read the result for the FAC 1.
4. Fault Isolation(1) Do the operational test of the AFS without rudder trim control switch (9CC) operation AMM 22-96-00-710-001 and read the result for the FAC 1.
(2) Do the operational test of the AFS (turn the rudder trim-control switch (9CC) in one direction) AMM 22-96-00-710-001 and read the result for the FAC 1.
Subtask 22-62-00-810-050-A
A. If the first test only gives the maintenance message AFS: FAC1/RT CTRL SW 9CC:
Subtask 22-62-00-810-051-A - replace the FAC-1 [1CC1] , AMM 22-66-34-000-002 and AMM 22-66-34-400-002.
- replace the CTL SW-RUDDER TRIM [9CC] .
- do a check and repair the
wiring of the RUD TR R NC SW COM and RUD TR L NC SW COM discretes from the FAC 1 (1CC1) to the rudder trim-control switch (9CC) , ASM 226803.
B. If the second test only gives the maintenance message AFS: FAC1/RT CTRL SW 9CC:
Subtask 22-62-00-810-052-A - replace the FAC-1 [1CC1] , AMM 22-66-34-000-002 and AMM 22-66-34-400-002.
- replace the CTL SW-RUDDER TRIM [9CC] .
- do a check and repair the
wiring of the RUD TR R NO SW MON or RUD TR L NO SW MON discretes from the FAC 1 (1CC1) to the rudder trim-control switch (9CC) , ASM 226803.
C. If the two tests give the maintenance message AFS: FAC1/RT CTRL SW 9CC:
Subtask 22-62-00-710-051-A - do a check and repair the
wiring of the ground signal at the rudder trim control switch (9CC) pin 3 ASM 226803.
D. Do the tests given in Para. 3.