Removal of the ENG/APU Fire Panel

TASK 26-12-12-000-001-A
Removal of the ENG/APU Fire Panel

ZONE: 211
FIN: 1WD

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT

C. Referenced Information

REFERENCE	DESIGNATION
Illustration of ENG/APU Fire Panel

3. Job Set-up
Subtask 26-12-12-941-050-A

A. Safety Precautions
(1) In the cockpit:
(a) On the ENG panel 115VU, put a WARNING NOTICE(S) to tell the persons not to start engines.
(b) On the OVERHEAD CTL & IND panel 25VU, put a WARNING NOTICE(S) to tell the persons not to start APU.

Subtask 26-12-12-865-050-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/FLOW/CTL &/IND1	1HB	D07
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
49VU	HYD/FIRE VALVE/Y/ENG2	3702GD	C14
49VU	HYD/FIRE VALVE/G/ENG1	1703GK	C13
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
49VU	HYDRAULIC/FIRE VALVE/G/ALTN	1711GK	H14
49VU	HYDRAULIC/FIRE VALVE/Y/ALTN	3712GD	H13
** 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	APU/FIRE AND OVHT/DET/LOOP B	2WG	L44
121VU	APU/FIRE AND OVHT/DET/LOOP A	1WG	L43
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
** 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
** ON A/C NOT FOR ALL
122VU	APU GEN/EGIU2/28VDC	26XU2	Y31
122VU	GEN2/EGIU2/28VDC	24XU2	Y30
122VU	ELEC/EXT PWR/EGIU1/28VDC	26XU1	Z31
122VU	ELEC/GEN1/EGIU1/28VDC	24XU1	Z30
** ON A/C NOT FOR ALL
122VU	AIR COND/FLOW/CTL AND IND/2	2HB	V21
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C ALL
122VU	ELEC/GCU/2	2XU2	T27
122VU	ELEC/GCU/1	2XU1	T26
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
** ON A/C NOT FOR ALL
123VU	GEN1/EGIU1/115VAC	23XU1	AF12
123VU	GEN2/EGIU2/115VAC	23XU2	AF01

4. Procedure
Subtask 26-12-12-020-050-B

CAUTION: BE CAREFUL WHEN YOU MOVE THE FIRE PANEL. SHOCKS CAN EASILY CAUSE DAMAGE TO ITS SUBCOMPONENTS AND MAKE THEM DEFECTIVE.

A. Remove the ENG/APU Fire Panel

Illustration of ENG/APU Fire Panel

(1) Hold the fire panel (2) and loosen the QAD fasteners (3) by a quarter turn.
(2) Remove the panel (2) from its housing.
(3) Disconnect the electrical connectors (1) from the panel (2).
(4) Put CAP - BLANKING on the electrical connectors (1) and on the fire panel (2).

[Rev.10 from 2021] 2026.03.31 23:42:26 UTC