Operational Test of the MASTER CAUT and MASTER WARN lights

TASK 31-50-00-710-011-A
Operational Test of the MASTER CAUT and MASTER WARN lights

ZONE: 210

1. Reason for the Job
To make sure that the MAST WARN and MAST CAUT lights operate correctly.
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
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 31-50-00-860-093-A

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

Subtask 31-50-00-865-077-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	SDAC/1/SPLY	3WV	F04
49VU	SDAC/2/26VAC SYNC/AC ESS BUS	6WV	F03
49VU	SDAC/1/26VAC SYNC/AC ESS BUS	5WV	F02
** 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	EIS/SDAC1 AND 2/BUS2/28VDC	44WV	P03
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
121VU	EIS/SDAC/2/SPLY	2WV	Q06
121VU	EIS/SDAC/1/BUS2/26VAC SYNC AC	7WV	Q03
121VU	EIS/SDAC/2/BUS2/26VAC SYNC AC	8WV	Q02
** 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 31-50-00-710-087-A

A. Operational Test of the MASTER CAUT lights

NOTE: If the MASTER CAUT lights are on before the test, on the ECAM control panel, push the CLR key to reset all warnings.

ACTION	RESULT
1.On the panel 121VU :
open the circuit breaker 2WV .	on the upper ECAM DU: * the FWS SDAC2 FAULT warning message comes into view.
open the circuit breaker 44WV.	* the ELEC DC BUS2 FAULT warning message comes into view. on the lower ECAM DU: * the ELEC page comes into view. the single chime operates. on the CAPT and F/O glareshield panels 131VU and 130VU: * the MASTER CAUT lights come on.
2.On the CAPT and F/O glareshield panel:
push then release the MASTER CAUT light.	the CAPT and F/O MASTER CAUT lights go off.
3.On the panel 121VU :
close the circuit breaker 44WV.	on the upper ECAM DU: * the ELEC DC BUS2 FAULT warning message goes out of view. on the lower ECAM DU: * the ELEC page goes out of view and the DOOR/OXY page comes into view.
close the circuit breaker 2WV.	On the upper ECAM DU: * the FWS SDAC2 FAULT warning message goes out of view. after a some seconds, other caution messages can come into view.
4.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.

Subtask 31-50-00-710-088-A

B. Operational Test of the MASTER WARN lights

ACTION	RESULT
1.On the ENG/APU FIRE panel 1WD: push and hold the ENG 1(2) TEST pushbutton switch.	On the ENG/APU FIRE panel 1WD: on the ENG 1(2) FIRE pushbutton switch, the FIRE legend comes on. on the ENG 1(2) AGENT 1 and AGENT 2 pushbutton switches, the SQUIB and DISCH legends come on.
	On the ENG panel 115VU: on the ENG/1(2) FIRE/FAULT annunciator, the FIRE legend comes on.
	After some seconds: the continuous repetitive chime operates.
	On the F/O and CAPT glareshield panels 130VU and 131VU: the MASTER WARN lights flash.
	On the upper ECAM DU: the ENG 1(2) FIRE warning message comes into view.
	On the lower ECAM DU: the ENGINE page automatically comes into view.
2.On the ENG/APU FIRE panel 1WD:
release the ENG 1(2) TEST pushbutton switch.	all the annunciator lights go off the continuous repetitive chime stops on the upper ECAM DU, the warning message goes out of view on the lower ECAM DU, the ENGINE page goes out of view

5. Close-up
Subtask 31-50-00-860-094-A

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:37:15 UTC