Operational Test of the Flight Warning Computer (FWC)

TASK 31-50-00-710-002-A
Operational Test of the Flight Warning Computer (FWC)

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
To make sure that the red visual and audio warnings are operated by a FWC.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. 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)
TASK 31-60-00-860-001-A	EIS Start Procedure

3. Job Set-up
Subtask 31-50-00-860-052-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001)

Subtask 31-50-00-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
49VU	FWS/FWC1/SPLY	3WW	F01
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
** ON A/C ALL
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
121VU	EIS/FWC2/SPLY	2WW	Q07
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q42
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40

4. Procedure
Subtask 31-50-00-710-052-B

A. Test

NOTE: Ignore all the indications that are not related to the ECAM system.

ACTION	RESULT
1.On the REAR C/B 121VU:
open the circuit breaker 2WW.	on the upper ECAM DU: FWS FWC 2 FAULT indication comes into view.
2.On the overhead panel 20VU, on the ENG/APU FIRE panel 1WD:
push the ENG1 loop/squib TEST pushbutton switch.	you hear the repetitive chime. on the glareshield: half the MASTER WARN lights flash; MASTER for CAPT side, WARN for F/O side. on the upper ECAM DU: the red ENG1 FIRE indication comes into view. on the lower ECAM DU: *the ENGINE page comes into view.
3.Release the ENG1 loop/squib TEST pushbutton switch.	the warnings go out of view except FWS FWC2 FAULT. on the lower ECAM DU: *the DOOR/OXY page comes into view.
4.Close the circuit breaker 2WW.	On the upper ECAM DU: FWS FWC2 FAULT goes out of view. after not many seconds, the MASTER lights can come on and some warnings can come into view. if not, do not do the step 5.
5.On the ECAM control panel:
push the CLR key to reset all warnings.	on the upper ECAM DU: the MEMO indication comes into view. on the lower ECAM DU: the DOOR page comes into view.
6.On the OVERHEAD C/B panel 49VU:
open the circuit breaker 3WW.	on the upper ECAM DU: FWS FWC 1 FAULT indication comes into view:
7.On the ENG/APU FIRE panel 1WD:
push the ENG1 loop/squib TEST pushbutton switch.	you hear the repetitive chime. on the glareshield: half the MASTER WARN lights flash; WARN for CAPT side, MASTER for F/O side. on the upper ECAM DU: the red ENG1 FIRE indication comes into view. on the lower ECAM DU: *the ENGINE page comes into view.
8.Release the ENG1 loop/squib TEST pushbutton switch.	the warnings go out of view, except FWS FWC1 FAULT on the lower ECAM DU: *the DOOR/OXY page comes into view.
9.Close the circuit breaker 3WW.	on the upper ECAM DU: FWS FWC1 FAULT goes out of view.
10.Push the MASTER light if it is on.

5. Close-up
Subtask 31-50-00-860-053-A

A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)
(3) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.01 00:37:06 UTC