DOC AIRBUS | TSM A320FSide Stick not Locked in AP Mode
TASK 27-93-00-810-942-A
Side Stick not Locked in AP Mode
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 27-93-00-860-113-A
Subtask 27-93-00-865-054-A
[Rev.8 from Aug 2018]
2026.04.04 04:38:54 UTC
Side Stick not Locked in AP Mode
1. Possible Causes
- SOLENOID-PITCH & ROLL LOCK, CAPT [12CA1]
- CAPT side stick assembly
wiring from the solenoid (12CA1) to the first terminal block wiring from the solenoid (12CA1) to the ground - SOLENOID-PITCH & ROLL LOCK, F/O [12CA2]
F/O side stick assembly wiring from the solenoid (12CA2) to the first terminal block wiring from the solenoid (12CA2) to the ground - RELAY-STICK LOCK 1/CAPT [21CA]
wiring from the relay (21CA) to the first terminal block - RELAY-STICK LOCK 1/F/O [23CA]
wiring from the relay (23CA) to the first terminal block - RELAY-STICK LOCK 2/CAPT [22CA]
wiring from the relay (22CA) to the first terminal block - RELAY-STICK LOCK 2/F/O [24CA]
wiring from the relay (24CA) to the first terminal block - C/B-AUTO FLT/STICK/LOCK [13CA]
wiring from the circuit breaker (13CA) to the first terminal block - FMGC-1 [1CA1]
- wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC1 to the first terminal block
- FMGC-2 [1CA2]
- wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC2 to the first terminal block
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 27-93-00-810-981-A | Side Stick not Locked in AP Mode (New-Generation Side-Stick Unit) |
| AMM 22-10-00-710-002 | Operational Test of Autopilot Disengagement and Locking Devices of the Side Stick Controller and Rudder Pedals |
| AMM 22-83-34-000-001 | Removal of the FMGC |
| AMM 22-83-34-400-001 | Installation of the FMGC |
| ASM 228408 | |
| AIPC 22840802 | |
| ASM 228501 | |
| AMM 27-92-41-000-001 | Removal of the Side Stick Assembly |
| AMM 27-92-41-000-004 | Removal of the Solenoid |
| AMM 27-92-41-400-001 | Installation of the Side Stick Assembly |
| AMM 27-92-41-400-004 | Installation of the Solenoid |
| AMM 27-92-41-860-801 | Identification of the Side Stick Installed on the Aircraft |
Subtask 27-93-00-860-113-A
A. Side Stick Identification
(1) Do the identification of the side stick installed on the aircraft AMM 27-92-41-860-801:
(a) If a new-generation side-stick unit is installed on the aircraft, refer to the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-981).
(b) If the side stick installed on the aircraft is not a new-generation side-stick unit, continue this procedure.
Subtask 27-93-00-710-056-A (1) Do the identification of the side stick installed on the aircraft AMM 27-92-41-860-801:
(a) If a new-generation side-stick unit is installed on the aircraft, refer to the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-981).
(b) If the side stick installed on the aircraft is not a new-generation side-stick unit, continue this procedure.
B. Test
Do the operational test of autopilot disengagement and locking devices of the side stick controller and rudder pedals AMM 22-10-00-710-002.
4. Fault IsolationDo the operational test of autopilot disengagement and locking devices of the side stick controller and rudder pedals AMM 22-10-00-710-002.
Subtask 27-93-00-865-054-A
A. Table of the circuit breakers used in this procedure:
Subtask 27-93-00-810-199-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | AUTO FLT/STICK/LOCK | 13CA | N16 |
B. If the CAPT side stick is not locked with AP1 then AP2 engaged:
(1) Replace the SOLENOID-PITCH & ROLL LOCK, CAPT [12CA1] AMM 27-92-41-000-004 and AMM 27-92-41-400-004.
(2) If the fault continues:
Subtask 27-93-00-810-200-A (1) Replace the SOLENOID-PITCH & ROLL LOCK, CAPT [12CA1] AMM 27-92-41-000-004 and AMM 27-92-41-400-004.
(2) If the fault continues:
- replace the CAPT side stick assembly AMM 27-92-41-000-001 and AMM 27-92-41-400-001.
- do a check of the
wiring from the solenoid (12CA1) to the first terminal block , pin A/A to the terminal block 1871VT ASM 228501 - do a check and repair the
wiring from the solenoid (12CA1) to the ground , pin A/B ASM 228501.
C. If the F/O side stick is not locked with AP1 then AP2 engaged:
(1) Replace the SOLENOID-PITCH & ROLL LOCK, F/O [12CA2] AMM 27-92-41-000-004 and AMM 27-92-41-400-004.
(2) If the fault continues:
Subtask 27-93-00-810-201-A (1) Replace the SOLENOID-PITCH & ROLL LOCK, F/O [12CA2] AMM 27-92-41-000-004 and AMM 27-92-41-400-004.
(2) If the fault continues:
- replace the
F/O side stick assembly AMM 27-92-41-000-001 and AMM 27-92-41-400-001.
- do a check of the
wiring from the solenoid (12CA2) to the first terminal block , pin A/A to the terminal block 1871VT ASM 228501 - do a check and repair the
wiring from the solenoid (12CA2) to the ground , pin A/B ASM 228501.
D. If the CAPT side stick is not locked with AP1 engaged only:
(1) Replace the RELAY-STICK LOCK 1/CAPT [21CA] AIPC 22840802.
(2) If the fault continues:
Subtask 27-93-00-810-202-A (1) Replace the RELAY-STICK LOCK 1/CAPT [21CA] AIPC 22840802.
(2) If the fault continues:
- do a check and repair the
wiring from the relay (21CA) to the first terminal block :
. pin A/A1 to the terminal block 1871VT
. pin A/A2 to the terminal block 1833VT
. pin A/X1 to the terminal block 1831VT
. pin A/X2 to the terminal block 1833VT ASM 228501.
E. If the F/O side stick is not locked with AP1 engaged only:
(1) Replace the RELAY-STICK LOCK 1/F/O [23CA] AIPC 22840802.
(2) If the fault continues:
Subtask 27-93-00-810-203-A (1) Replace the RELAY-STICK LOCK 1/F/O [23CA] AIPC 22840802.
(2) If the fault continues:
- do a check and repair the
wiring from the relay (23CA) to the first terminal block :
. pin A/A1 to the terminal block 1871VT
. pin A/A2 to the terminal block 1833VT
. pin A/X1 to the terminal block 1831VT
. pin A/X2 to the terminal block 1833VT ASM 228501.
F. If the CAPT side stick is not locked with AP2 engaged only:
(1) Replace the RELAY-STICK LOCK 2/CAPT [22CA] AIPC 22840802.
(2) If the fault continues:
Subtask 27-93-00-810-204-A (1) Replace the RELAY-STICK LOCK 2/CAPT [22CA] AIPC 22840802.
(2) If the fault continues:
- do a check and repair the
wiring from the relay (22CA) to the first terminal block :
. pin A/A1 to the terminal block 1871VT
. pin A/A2 to the terminal block 1833VT
. pin A/X1 to the terminal block 1840VT
. pin A/X2 to the terminal block 1842VT ASM 228501.
G. If the F/O side stick is not locked with AP2 engaged only:
(1) Replace the RELAY-STICK LOCK 2/F/O [24CA] AIPC 22840802.
(2) If the fault continues:
Subtask 27-93-00-810-205-A (1) Replace the RELAY-STICK LOCK 2/F/O [24CA] AIPC 22840802.
(2) If the fault continues:
- do a check and repair the
wiring from the relay (24CA) to the first terminal block :
. pin A/A1 to the terminal block 1871VT
. pin A/A2 to the terminal block 1833VT
. pin A/X1 to the terminal block 1840VT
. pin A/X2 to the terminal block 1842VT ASM 228501.
H. If the CAPT and F/O side sticks are not locked with AP1 then AP2 engaged:
(1) Replace the C/B-AUTO FLT/STICK/LOCK [13CA] ASM 228408.
(2) If the fault continues:
Subtask 27-93-00-810-206-A (1) Replace the C/B-AUTO FLT/STICK/LOCK [13CA] ASM 228408.
(2) If the fault continues:
- do a check and repair the
wiring from the circuit breaker (13CA) to the first terminal block ASM 228501.
I. If the CAPT and F/O side sticks are not locked with AP1 engaged only:
(1) Replace the FMGC-1 [1CA1] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
(2) If the fault continues:
Subtask 27-93-00-810-207-A (1) Replace the FMGC-1 [1CA1] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
(2) If the fault continues:
- replace the RELAY-STICK LOCK 1/CAPT [21CA] AIPC 22840802.
- replace the RELAY-STICK LOCK 1/F/O [23CA] AIPC 22840802.
- do a check of the wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC1 to the first terminal block ASM 228501.
- repair the above wiring.
- do a check for a short circuit and repair the wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC1 to the relay (23CA) and the relay (21CA) ASM 228501.
J. If the CAPT and F/O side sticks are not locked with AP2 engaged only:
(1) Replace the FMGC-2 [1CA2] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
(2) If the fault continues:
Subtask 27-93-00-710-057-A (1) Replace the FMGC-2 [1CA2] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
(2) If the fault continues:
- do a check of the wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC2 to the first terminal block ASM 228501.
- repair the above wiring.
- do a check for a short circuit and repair the wiring of the STICK LOCK COM and STICK LOCK MON signals from the FMGC2 to the relay (22CA) and the relay (24CA) ASM 228501.
K. Do the test given in Para. 3.