Loss of the Side Stick Priority Signal (New-Generation Side-Stick Unit)

TASK 27-92-00-810-842-A
Loss of the Side Stick Priority Signal (New-Generation Side-Stick Unit)

NOTE: This task is applicable only for the new-generation side-stick unit.

1. Possible Causes

RELAY-TAKEOVER & PRIORITY 1 [47CE1]
wiring
CAPT Side Stick Control-Handle (New-Generation Side Stick)
wiring from the connector 2197VC
F/O Side Stick Control-Handle (New-Generation Side Stick)
wiring from the connector 2188VC
SEC-1 [1CE1]
ELAC-1 [2CE1]
RELAY-TAKEOVER & PRIORITY 2 [47CE2]
wiring from the connector 2199VC
wiring from the connector 2190VC
SEC-3 [1CE3]
SEC-2 [1CE2]
ELAC-2 [2CE2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AIPC 279208
ASM 279217
AMM 27-92-41-000-803	Removal of the Control-Handle of the New-Generation Side-Stick Unit
AMM 27-92-41-400-803	Installation of the Control-Handle of the New-generation Side-Stick Unit
AWM 279293
AWM 279294
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-710-003	Operational Test of the Side Stick Priority
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-92-00-700-057-A

A. Test
(1) Do the operational test of the side stick priority AMM 27-96-00-710-003.
(2) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-92-00-810-098-A

A. If the tests give the maintenance message CHECK PRIORITY WIRING:
(1) Do the tests given in Para. 3. with only the SEC 1 and the ELAC 1 engaged for the operational test of the side stick priority (SEC 2, SEC 3, ELAC 2 pushbuttons OFF).

If the tests do not give the maintenance message:
. Go to paragraph (2).
If the tests give the maintenance message again:

(a) Do the same tests:

With action on the CAPT takeover and priority pushbutton switch for the operational test of the side stick priority.

1 If the tests give the maintenance message again:

Do the same tests with action on the F/O takeover and priority pushbutton switch for the operational test of the side stick priority.

a If the tests give the maintenance message again:

Replace the RELAY-TAKEOVER & PRIORITY 1 [47CE1] AIPC 279208.
If the fault continues:
. Do a check and repair the wiring from the relay (47CE1) pins A/1, 2, X, Z to the first terminal block and from pin A/A to the ground terminal ASM 279217.
If the fault continues, go to paragraph (b).

b If the tests do not give the maintenance message:

Replace the CAPT Side Stick Control-Handle (New-Generation Side Stick) AMM 27-92-41-000-803 and AMM 27-92-41-400-803.
If the fault continues:
. Do a check and repair the wiring from the connector 2197VC , pins S, A and B to the first terminal block AWM 279293.
If the fault continues, go to paragraph (b).

2 If the tests do not give the maintenance message:
a Replace the F/O Side Stick Control-Handle (New-Generation Side Stick) AMM 27-92-41-000-803 and AMM 27-92-41-400-803.
b If the fault continues:

Do a check and repair the wiring from the connector 2188VC , pins S, A and B, to the first terminal block AWM 279293.

c If the fault continues, go to paragraph (b).
(b) Remove the ELAC 1 AMM 27-93-34-000-001 from its rack.

Do the tests given in Para. 3. with the SEC 1 engaged (SEC 2, SEC 3, ELAC 2 pushbuttons OFF).

1 If the tests give the maintenance message again:
a Reinstall the ELAC 1 AMM 27-93-34-400-001.
b Replace the SEC-1 [1CE1] AMM 27-94-34-000-001 AMM 27-94-34-400-001.
c If the fault continues:

Do a check of the insulation of the DSI 29, DSI 30 of the SEC-1 [1CE1] and repair it.

2 If the tests do not give the maintenance message:
a Replace the ELAC-1 [2CE1] AMM 27-93-34-400-001.
b If the fault continues:

Do a check of the insulation of the DSI 35, DSI 36 of the ELAC-1 [2CE1] and repair it.

(2) Do the tests given in Para. 3.:

With the SEC 2, SEC 3 and ELAC 2 engaged (SEC 1, ELAC 1 pushbuttons OFF).
With action on the CAPT takeover and priority pushbutton switch for the operational test of the side stick priority.

(a) If the tests give the maintenance message:

Do the same tests with action on the F/O takeover and priority pushbutton switch for the operational test of the side stick priority.

1 If the tests give the maintenance message again:
a Replace the RELAY-TAKEOVER & PRIORITY 2 [47CE2] AIPC 279208.
b If the fault continues:
. Do a check and repair the wiring from the relay (47CE2) pins A/1, 2, X, Z to the first terminal block and from pin A/A to the ground terminal ASM 279217.
c If the fault continues, go to paragraph (c).
2 If the tests do not give the maintenance message:
a Replace the CAPT Side Stick Control-Handle (New-Generation Side Stick) AMM 27-92-41-000-803 and AMM 27-92-41-400-803.
b If the fault continues:
. Do a check and repair the wiring from the connector 2199VC , pins H, J and K to the first terminal block AWM 279294.
c If the fault continues, go to paragraph (c).
(b) If the tests do not give the maintenance message:
1 Replace the F/O Side Stick Control-Handle (New-Generation Side Stick) AMM 27-92-41-000-803 and AMM 27-92-41-400-803.
2 If the fault continues:

Do a check and repair the wiring from the connector 2190VC , pins H, J and K to the first terminal block AWM 279294.

3 If the fault continues, go to paragraph (c).
(c) Remove the SEC 3 AMM 27-94-34-000-001 from its rack.

Do the tests given in Para. 3. with the SEC 2 and ELAC 2 engaged (SEC 1, ELAC 1, pushbuttons OFF).

1 If the tests do not give the maintenance message:
a Replace the SEC-3 [1CE3] AMM 27-94-34-400-001.
b If the fault continues:

Do a check of the insulation of the DSI 29, DSI 30 of the SEC-3 [1CE3] and repair it.

2 If the tests give the maintenance message again:
a Reinstall the SEC 3 AMM 27-94-34-400-001.
b Go to paragraph (d).
(d) Remove the SEC 2 AMM 27-94-34-000-001 from its rack.

Do the tests again with the SEC 3 and ELAC 2 engaged (SEC 1, ELAC 1, pushbuttons OFF).

1 If the tests do not give the maintenance message:
a Replace the SEC-2 [1CE2] AMM 27-94-34-400-001.
b If the fault continues:

Do a check of the insulation of the DSI 29, DSI 30 of the SEC 3 and repair it.

2 If the tests give the maintenance message again:
a Reinstall the SEC 2 AMM 27-94-34-400-001.
b Go to paragraph (e).
(e) Replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 AMM 27-93-34-400-001.
1 If the fault continues:

Do a check of the insulation of the DSI 35, DSI 36 of the ELAC-2 [2CE2] and repair it.

Subtask 27-92-00-700-058-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:39:16 UTC