Operational Test of the Ignition System [CFMB]

TASK 74-00-00-710-043-A
Operational Test of the Ignition System

1. Reason for the Job
To do an aural check of the igniter plug operation.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
Ignition System Test
Ignition System Test

3. Job Set-up
Subtask 74-00-00-861-050-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 74-00-00-865-050-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40

Subtask 74-00-00-860-050-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the MAINTENANCE PNL 50VU :
(a) Release the ENG/FADEC GND PWR/1 (2) pushbutton switch. The ON legend of this pushbutton switch is on.
(2) On the left or right MCDU, get the SYSTEM REPORT/TEST ENG menu page

Ignition System Test ** ON A/C NOT FOR ALL

4. Procedure
Subtask 74-00-00-710-050-B ** ON A/C NOT FOR ALL

WARNING: BEFORE YOU PUSH THE MAN START PUSHBUTTON SWITCH, MAKE SURE THAT, ON THE ECAM DISPLAY UNIT, THE PRESSURE AT THE STARTER VALVE INLET IS ZERO PSI. IF THE PRESSURE IS NOT ZERO PSI, THE ENGINE CAN ROTATE AND CAUSE INJURY.

A. Do this test :

NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.

ACTION	RESULT
1.On the MCDU:
Push the line key adjacent to the FADEC 1A (2A) indication.	The ENGINE 1(2) MAIN MENU page comes into view. Ignition System Test ** ON A/C NOT FOR ALL
2.Push the line key adjacent to the IGN TEST indication. Ignition System Test ** ON A/C NOT FOR ALL	The IGNITION TEST menu comes into view. Ignition System Test ** ON A/C NOT FOR ALL
3.On the panel 115VU:
Make sure that the ENG/MODE selector switch is in the NORM position.
4.Set the ENG/MASTER 1 (2) control switch to ON.
5.Push the line key adjacent to the PUSH BUTTON TO START TEST indication. Ignition System Test ** ON A/C NOT FOR ALL	The CAUTION: IGNITERS WILL CYCLE DURING TEST IGNITER A TESTED THEN B indication comes into view Ignition System Test ** ON A/C NOT FOR ALL
	IGNITER A THEN B WILL CYCLE FOR 10 SECS EACH. Make sure that igniter 1 of the engine 1(2) makes noise for 10 seconds and after about 2 seconds the igniter 2 of the engine 1(2) makes noise for 10 seconds.
	TEST COMPLETE comes into view. When the test is finished Ignition System Test ** ON A/C NOT FOR ALL
6.Set the ENG/MASTER 1 (2) control switch to OFF.
7.Push the line key adjacent to the RETURN indication.	The ENGINE menu comes into view.
8.Do the procedure again for the channel B of the FADEC 1 (2).
9.On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
10.Stop the MCDU.

5. Close-up
Subtask 74-00-00-860-051-A ** ON A/C NOT FOR ALL

A. On the panel 50VU:
(1) Push the ENG/FADEC GND PWR 1(2) pushbutton switch. The ON legend goes off.

Subtask 74-00-00-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 03:07:20 UTC