Display of an Operational Warning or Maintenance Status on the Upper ECAM DU with no Maintenance Message

TASK 27-00-00-810-801-A
Display of an Operational Warning or Maintenance Status on the Upper ECAM DU with no Maintenance Message

1. Possible Causes

FCDC-1 [3CE1]
FCDC-2 [3CE2]
wiring from the DSI 24 signal of the SEC1 (1CE1) to the first terminal block
wiring from the overriding signal of the THS actuator (9CE) to the first terminal block
FWC-1 [1WW1]
SYSTEM-PRESS-SW [1151GN]
SYSTEM-PRESS-SW [2151GN]
SYSTEM-PRESS-SW [3151GN]
wiring from the FWC 1 to the pressure switch 1151GN
wiring from the FWC 1 to the pressure switch 2151GN
wiring from the FWC 1 to the pressure switch 3151GN
P/BSW-TAKEOVER & PRIORITY, CAPT [8CE1]
P/BSW-TAKEOVER & PRIORITY, F/O [8CE2]
RELAY-ELAC 1 ANN SPLY [40CE1]
ELAC-1 [2CE1]
RELAY-ELAC 2 ANN SPLY [40CE2]
ELAC-2 [2CE2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-10-00-810-822-A	Loss of the Mode Transducer Signal for the Right Green Aileron Servo Control
TSM TASK 27-93-00-810-930-A	Loss of the Pitch Change Over Signal by the ELAC 2
TSM TASK 27-93-00-810-931-A	Loss of the Pitch Change Over Signal by the ELAC 1
TSM TASK 27-93-00-810-937-A	Failure of the Roll Side Stick Transducer Unit Potentiometer or of the R G Aileron Servocontrol
TSM TASK 27-93-00-810-947-A	False ELAC Warning due to Faulty Hydraulic Pressure Switch
TSM TASK 27-93-00-810-948-A	Incorrect Hydraulic Pressure Status Received by the FWC
TSM TASK 27-94-00-810-901-A	SEC 1 Fault without any associated maintenance message
TSM TASK 27-94-00-810-902-A	SEC 2 Fault without any associated maintenance message
TSM TASK 27-94-00-810-903-A	SEC 3 Fault without any associated maintenance message
ASM 279203
AMM 27-92-41-000-011	Removal of the Pushbutton Switch-Takeover and Priority
AMM 27-92-41-000-803	Removal of the Control-Handle of the New-Generation Side-Stick Unit
AMM 27-92-41-400-011	Installation of the Pushbutton Switch-Takeover and Priority
AMM 27-92-41-400-803	Installation of the Control-Handle of the New-generation Side-Stick Unit
AMM 27-92-41-860-801	Identification of the Side Stick Installed on the Aircraft
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
ASM 279412
ASM 279504
ASM 279505
AMM 27-95-34-000-001	Removal of the FCDC
AMM 27-95-34-400-001	Installation of the FCDC
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)
AMM 29-10-00-200-008	Check Nitrogen Charge Pressure on Hydraulic Power Accumulators
AMM 29-10-00-863-003	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-23-00-863-001	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-24-00-863-001	Pressurize the Yellow Hydraulic System with the Electric Pump
ASM 293201
AMM 29-32-12-000-001	Removal of the System Pressure Switch
AMM 29-32-12-400-001	Installation of the System Pressure Switch
AMM 31-53-34-000-001	Removal of the Flight Warning Computer (FWC)
AMM 31-53-34-400-001	Installation of the Flight Warning Computer (FWC)

3. Fault Confirmation
Subtask 27-00-00-710-050-A

A. Test
(1) Do a check for a maintenance mesage related to the warning message on the Post Flight Report (PFR).

NOTE: Some operational warnings are not printed on the PFR.
They are for flight crew awareness only (for example, F/CTL SPD BRK DISGREE, F/CTL SPD BRK STILL OUT).

(a) If there is a maintenance message:

Do the related trouble shooting procedure.

(b) If there is no maintenance message:
1 Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
a If there is a maintenance message:

Do the related trouble shooting procedure.

b If there is no maintenance message:

Continue this trouble shooting procedure.

4. Fault Isolation
Subtask 27-00-00-810-050-A

A. If a warning is shown and if the BITE test of the EFCS (ground scanning) does not give a maintenace message related to the warning message:
(1) Remove the FCDC-1 ( 3CE1 ) AMM 27-95-34-000-001.
(a) If the warning stays into view:
1 Install the FCDC-1 ( 3CE1 ) AMM 27-95-34-400-001.
2 Continue this trouble shooting procedure.
(b) If the warning goes out off view:
1 Replace the FCDC-1 [3CE1] AMM 27-95-34-000-001 AMM 27-95-34-400-001.
(2) Remove the FCDC-2 ( 3CE2 ) AMM 27-95-34-000-001.
(a) If the warning stays into view:
1 Install the FCDC-2 ( 3CE2 ) AMM 27-95-34-400-001.
2 Continue this trouble shooting procedure.
(b) If the warning goes out off view:
1 Replace the FCDC-2 [3CE2] FCDC-2 ( 3CE2 ) AMM 27-95-34-000-001 AMM 27-95-34-400-001.
(3) If the warning F/CTL SPD BRK DISAGREE or F/CTL SPD BRK STILL OUT appeared during the last flight with no maintenance message associated, and it is not present on ground:

No action is necessary.

(4) If the maintenance status F/CTL is shown:

Do a check of the P/N of the FCDC installed on the A/C:

(a) If the P/N of the FCDC is 115370-0105 or 115370-0106 or 115370-1016 or 115370-1216:
1 Do the trouble shooting procedure (Ref. TSM TASK 27-10-00-810-822) (because of TFU Ref 27.95.00.033).
(b) If the P/N of the FCDC is different from 115370-0105 or 115370-0106 or 115370-1016 or 115370-1216:

Do a check of the wiring from the DSI 24 signal of the SEC1 (1CE1) to the first terminal block COM part and MON part ASM 279412.

1 If there is no continuity, repair the wiring.
2 If there is continuity:

Do a check and repair the wiring from the overriding signal of the THS actuator (9CE) to the first terminal block ASM 279412.

(5) If the warning message F/CTL ELAC1 PITCH FAULT or F/CTL ELAC2 PITCH FAULT is shown with no maintenance message associated:
Pressurize the aircraft hydraulic systems AMM 29-10-00-863-003 AMM 29-23-00-863-001 AMM 29-24-00-863-001.
(a) If the warning message F/CTL ELAC1 PITCH FAULT or F/CTL ELAC2 PITCH FAULT stays into view:

For ELAC1, do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-931)
For ELAC2, do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-930).

(b) If the warning message F/CTL ELAC1 PITCH FAULT or F/CTL ELAC2 PITCH FAULT goes out of view:

Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001

1 If the test gives a maintenance message related to the Yellow, Green or Blue hydraulic pressure switch with a F/CTL maintenance status:

Do the trouble shooting procedure related to this maintenance message.

2 If the test does not give a maintenance message:

Do an inspection of nitrogen charge pressure on hydraulic power accumulators AMM 29-10-00-200-008.

a If the fault continues:

Replace the FWC-1 [1WW1] AMM 31-53-34-000-001 AMM 31-53-34-400-001.

b If the fault continues:

Replace the SYSTEM-PRESS-SW [1151GN] AMM 29-32-12-000-001 AMM 29-32-12-400-001.

c If the fault continues:

Replace the SYSTEM-PRESS-SW [2151GN] AMM 29-32-12-000-001 AMM 29-32-12-400-001.

d If the fault continues:

Replace the SYSTEM-PRESS-SW [3151GN] AMM 29-32-12-000-001 AMM 29-32-12-400-001.

e If the fault continues:

Do a check of the wiring from the FWC 1 to the pressure switch 1151GN ASM 293201.

f If the fault continues:

Do a check of the wiring from the FWC 1 to the pressure switch 2151GN ASM 293201.

g If the fault continues:

Do a check of the wiring from the FWC 1 to the pressure switch 3151GN ASM 293201.

(6) If the operational warning message CONFIG L SIDESTICK FAULT or CONFIG R SIDESTICK FAULT is shown:
Do the operational test of the side stick priority AMM 27-96-00-710-003.
(a) If the result of the test is not satisfactory:
1 Do the identification of the side-stick installed on the aircraft, refer to the procedure AMM 27-92-41-860-801.
a If the side-stick installed on the aircraft is not a new-generation side-stick:

Replace the P/BSW-TAKEOVER & PRIORITY, CAPT [8CE1] or P/BSW-TAKEOVER & PRIORITY, F/O [8CE2] AMM 27-92-41-000-011 AMM 27-92-41-400-011.

b If the side-stick installed on the aircraft is a new-generation side-stick:

Replace the control handle of the new-generation side-stick AMM 27-92-41-000-803 AMM 27-92-41-400-803.

(7) If the warning message F/CTL AIL SERVO FAULT is shown with no maintenance message associated:
(a) Do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-937).
(8) If the warning message F/CTL ELAC 1 FAULT and F/CTL ELAC 2 FAULT are shown with no maintenance message associated:
(a) Pressurize the aircraft hydraulic systems AMM 29-10-00-863-003 AMM 29-23-00-863-001 AMM 29-24-00-863-001.
1 If the warning message F/CTL ELAC 1 FAULT and F/CTL ELAC 2 FAULT go out of view when the hydraulic systems are pressurized, do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-948).
(9) If the warning message F/CTL ELAC 1 FAULT is shown with no maintenance message associated:
(a) Pressurize the aircraft hydraulic systems AMM 29-10-00-863-003 AMM 29-23-00-863-001 AMM 29-24-00-863-001.
1 If the F/CTL ELAC 1 FAULT warning goes out view when the hydraulic systems are pressurized, do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-947).
2 If the ELAC 1 FAULT warning stays into view:

Continue this trouble shooting.

(b) Remove the ELAC-1 (2CE1) AMM 27-93-34-000-001.
(c) At the ELAC 1 receptacle, do a check of the resistance between pin AB/11J and pin AE/14C ASM 279203.
1 If the resistance is less than 280 ohms:
a Remove the RELAY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.
b Do a check of the resistance of the relay between pin X1 and pin X2 ASM 279203.

If the resistance is less than 280 ohms:
. Replace the RELAY-ELAC 1 ANN SPLY [40CE1] AIPC 27920803.
. Install a new ELAC-1 [2CE1] AMM 27-93-34-400-001.
If the resistance is between 280 and 400 ohms:
. Do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 1 ASM 279203
. Install the relay.
. Install a new ELAC-1 (2CE1) AMM 27-93-34-400-001.

2 If the resistance is more than 400 ohms:
a Remove the RELAY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.
b Do a check of the resistance of the relay between pin X1 and pin X2 ASM 279203.

If the resistance is more than 400 ohms:
. Replace the RELAY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.
. Install the ELAC-1 (2CE1) AMM 27-93-34-400-001.
If the resistance is between 280 and 400 ohms:
Do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 1 ASM 279203
. Install the relay.
. Install the ELAC 1 AMM 27-93-34-400-001.

3 If the resistance is between 280 and 400 ohms:
a Remove the RELAY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.

If the warning ELAC1 stays:
. Install the RLY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.
. Continue the trouble shooting procedure.
If the warning ELAC1 goes off:
. Replace the RLY-ELAC 1 ANN SPLY (40CE1) AIPC 27920803.
. Install the ELAC 1 AMM 27-93-34-400-001.

b Do a check and repair the wiring of the DSI 4/1 (ELAC1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-ELAC 1 ANN SPLY (40CE1) ASM 279504 and ASM 279505.

Install the ELAC1 AMM 27-93-34-400-001.

(10) If the warning message F/CTL ELAC 2 FAULT is shown with no maintenance message associated:
(a) Pressurize the aircraft hydraulic systems AMM 29-10-00-863-003 AMM 29-23-00-863-001 AMM 29-24-00-863-001.
1 If the F/CTL ELAC 2 FAULT warning goes out of view when the hydraulic systems are pressurized, do the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-947).
2 If the ELAC 2 FAULT warning stays into view:

Continue this trouble shooting.

(b) Remove the ELAC-2 (2CE2) AMM 27-93-34-000-001.
(c) At the ELAC 2 receptacle, do a check of the resistance between pin AB/11J and pin AE/14C ASM 279203.
1 If the resistance is less than 280 ohms:
a Remove the RELAY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.
b Do a check of the resistance of the relay between pin X1 and pin X2 ASM 279203.

If the resistance is less than 280 ohms:
. Replace the RELAY-ELAC 2 ANN SPLY [40CE2] AIPC 27920803.
. Install a new ELAC-2 [2CE2] AMM 27-93-34-400-001.
If the resistance is between 280 and 400 ohms:
. Do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 2 ASM 279203
. Install the relay.
. Install a new ELAC-2 (2CE2) AMM 27-93-34-400-001.

2 If the resistance is more than 400 ohms:
a Remove the RELAY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.
b Do a check of the resistance of the relay between pin X1 and pin X2 ASM 279203.

If the resistance is more than 400 ohms:
. Replace the RELAY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.
. Install the ELAC-2 (2CE2) AMM 27-93-34-400-001.
If the resistance is between 280 and 400 ohms:
. Do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 2 ASM 279203.
. Install the relay.
. Install the ELAC 2 AMM 27-93-34-400-001.

3 If the resistance is between 280 and 400 ohms:
a Remove the RELAY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.

If the warning ELAC2 stays:
. Install the RLY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.
. Continue the trouble shooting procedure.
If the warning ELAC2 goes off:
. Replace the RLY-ELAC 2 ANN SPLY (40CE2) AIPC 27920803.
. Install the ELAC 2 AMM 27-93-34-400-001.

b Do a check and repair the wiring of the DSI 4/2 (ELAC2 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-ELAC 2 ANN SPLY (40CE2) ASM 279504 and ASM 279505.

Install the ELAC2 AMM 27-93-34-400-001.

(11) If the warning message F/CTL SEC 1/2/3 FAULT is shown with no maintenance message associated, do the following steps:
(a) For SEC1:

Do the trouble shooting procedure (Ref. TSM TASK 27-94-00-810-901).

(b) For SEC2:

Do the trouble shooting procedure (Ref. TSM TASK 27-94-00-810-902).

Do the trouble shooting procedure (Ref. TSM TASK 27-94-00-810-903).

[Rev.8 from Aug 2018] 2026.04.04 04:27:26 UTC