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:

replace the FAC-1 [1CC1] , AMM 22-66-34-000-002 and AMM 22-66-34-400-002.

(1) If the fault continues:

replace the P/BSW-RUD TRIM/RESET [8CC] AIPC 226708.

(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:

replace the FAC 1 (1CC1) AMM 22-66-34-000-002 and AMM 22-66-34-400-002.

(1) If the fault continues:

replace the P/BSW-RUD TRIM/RESET [8CC] AIPC 226708.

(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 04:38:55 UTC