Failure of the EMER ELEC PWR/GEN1 LINE Pushbutton Switch Circuit

TASK 24-22-00-810-814-A
Failure of the EMER ELEC PWR/GEN1 LINE Pushbutton Switch Circuit

1. Possible Causes

P/BSW-EMER ELEC PWR/GEN1 LINE [13XU]
RELAY [20XU]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2045110
ASM 242202
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-60-00-860-001	EIS Start Procedure
AMM 71-00-00-710-003	Engine Automatic Start
AMM 71-00-00-710-028	Engine Shutdown
AMM 71-00-00-860-814	Shutdown of the Engine
AMM 71-00-00-860-823	Start the Engine (Normal Automatic Start)

3. Fault Confirmation
Subtask 24-22-00-860-064-A ** ON A/C NOT FOR ALL

A. Job Set-up
(1) Push the ELEC/GEN 1 pushbutton switch (3XU1).
(2) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
(3) Start the engine 1 AMM 71-00-00-710-003.

Subtask 24-22-00-860-064-D ** ON A/C NOT FOR ALL

A. Job Set-up
(1) In the cockpit, on the ELEC panel 35VU:

Push the GEN 1 pushbutton switch (3XU1).

(2) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
(3) Start engine 1 AMM 71-00-00-860-823.

Subtask 24-22-00-710-067-A

B. Test

ACTION	RESULT
1.On the ECAM control panel: push the ELEC key to get the ELEC page.	On the upper ECAM DU: the EMER GEN 1 LINE OFF message comes into view.
2.On the EMER ELEC PWR section of overhead panel 21VU: release and push the GEN 1 LINE pushbutton switch (13XU).	If on the upper ECAM DU: the EMER GEN 1 LINE OFF message goes out of view, stop the trouble shooting. If on the upper ECAM DU: the EMER GEN 1 LINE OFF message stays in view, continue the trouble shooting (refer to the fault isolation which follows).

4. Fault Isolation
Subtask 24-22-00-865-050-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
49VU	FWS/FWC1/SPLY	3WW	F01
121VU	EIS/FWC2/SPLY	2WW	Q07
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06

Subtask 24-22-00-810-063-A

B. If the test confirms the fault:

open the circuit breakers 5HQ, 6HQ, 30LP
replace the P/BSW-EMER ELEC PWR/GEN1 LINE [13XU] ESPM 2045110
close the circuit breakers 5HQ, 6HQ, 30LP.

(1) If the fault continues:

open the circuit breakers 5HQ, 6HQ, 30LP, 2WW and 3WW
replace the RELAY [20XU] ASM 242202
close the circuit breakers 5HQ, 6HQ, 30LP, 2WW and 3WW.

(a) If the fault continues:

open the circuit breakers 5HQ, 6HQ, 30LP, 2WW and 3WW
do a check and repair the wiring between:
. the pin AD/8B of the FWC 1 (1WW1) and the pin A/2 of the relay (20XU)
. the pin AD/8B of the FWC 2 (1WW2) and the pin A/2 of the relay (20XU)
. the pin A/X of the relay (20XU) and the pin A/B2 of the EMER ELEC PWR/GEN 1 LINE pushbutton switch (13XU)
close the circuit breakers 5HQ, 6HQ, 30LP, 2WW and 3WW.

Subtask 24-22-00-710-068-A

C. Do the test given in Para. 3.

5. Close-up
Subtask 24-22-00-860-065-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Stop the engine 1 AMM 71-00-00-710-028.
(2) Put the aircraft back to its initial configuration.
(3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

Subtask 24-22-00-860-065-D ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Stop engine 1 AMM 71-00-00-860-814.
(2) Put the aircraft back to its initial configuration.
(3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:26:35 UTC