Removal of the CABIN PRESSURE Warning-Light Panel from the Forward Passenger/Crew Door

TASK 52-73-22-000-001-A
Removal of the CABIN PRESSURE Warning-Light Panel from the Forward Passenger/Crew Door

WARNING: DO NOT OPEN THE PASSENGER/CREW DOOR IF THE WIND SPEED IS MORE THAN 65 KNOTS.

WARNING: BEFORE YOU START WORK ON THE DOOR, MAKE SURE THAT:

THE EMERGENCY CONTROL HANDLE IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED.
THE PERCUSSION LEVER OF THE DOOR-DAMPER AND EMERGENCY-OPERATION CYLINDER IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED.

IF YOU DO NOT OBEY THESE INSTRUCTIONS, THE DOOR CAN OPEN WITH FORCE OR THE ESCAPE SLIDE CAN DEPLOY SUDDENLY. THIS CAN CAUSE INJURY AND/OR DAMAGE.

WARNING: STOP THE OPENING PROCEDURE IF THE RED WARNING LIGHT FLASHES. IF THE RED WARNING LIGHT FLASHES, REMAINING PRESSURE CAN CAUSE THE DOOR TO OPEN SUDDENLY AND CAN:

KILL OR CAUSE SERIOUS INJURY TO PERSONS
CAUSE DAMAGE TO THE AIRCRAFT.

ZONE: 831
ZONE: 841
FIN: 16WN1
FIN: 16WN2

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	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
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
831	FORWARD PASSENGER/CREW DOOR
841	FORWARD PASSENGER/CREW DOOR
831, 841
FOR [16WN1] (WARN LT PNL-CABIN PRESSURE, FWD L DOOR)
831DZ, 831EZ
FOR [16WN2] (WARN LT PNL-CABIN PRESSURE, FWD R DOOR)
841DZ, 841EZ

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-23-46-000-001-A	Removal of the Door Linings from the Forward Passenger/Crew Doors
TASK 52-10-00-010-001-A	Opening of the Passenger/Crew Door
TASK 52-10-00-860-001-A	Special Precautions before Work on the Passenger/Crew Door
Forward Passenger/Crew Door CABIN PRESSURE Warning-Light Panel

3. Job Set-up
Subtask 52-73-22-010-050-A

A. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at zone 831(841).
(2) Open forward passenger/crew door 831 or 841 (Ref. AMM TASK 52-10-00-010-001).
(3) Obey the special precautions before you start the work on the door (Ref. AMM TASK 52-10-00-860-001).

Subtask 52-73-22-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/OIL/PRESS	2EN2	N42
121VU	ENGINE/ENG1/OIL/PRESS	2EN1	N40
** ON A/C ALL
121VU	EIS/SLIDES/ARM AND WARN/FLT	15WN	P11
121VU	EIS/SLIDES/ARM AND WARN/GND	13WN	P10
** ON A/C NOT FOR ALL
121VU	OIL/PRESS/ENG2	10KC2	N42
121VU	OIL/PRESS/ENG1	10KC1	N40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/OIL/PRESS/AND REV SNSR/CHAN A	2EN2	N42
121VU	ENGINE/ENG1/OIL/PRESS/AND REV SNSR/CHAN A	2EN1	N40

Subtask 52-73-22-860-053-A

C. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put the WARNING NOTICE(S) in position to tell persons that the two thrust-reverser control levers are not serviceable.

Subtask 52-73-22-010-051-A

D. Removal of the Door Linings
(1) Remove the applicable door linings (Ref. AMM TASK 25-23-46-000-001):
(a) FOR [16WN1] (WARN LT PNL-CABIN PRESSURE, FWD L DOOR)

831DZ and 831EZ.

(b) FOR [16WN2] (WARN LT PNL-CABIN PRESSURE, FWD R DOOR)

841DZ and 841EZ.

4. Procedure
Subtask 52-73-22-020-050-A

A. Removal of the CABIN PRESSURE Warning-Light Panel
(1) Disconnect the electrical connector (7) from the electrical receptacle (6).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Push the tabs (2) of the CABIN PRESSURE warning-light panel (1) and remove the CABIN PRESSURE warning-light panel (1) from the lining panel (5).

Subtask 52-73-22-020-054-A

B. Removal of the Lamps
(1) Carefully remove the lens (4) from the CABIN PRESSURE warning-light panel (1).
(2) Carefully remove the lamps (3) from the CABIN PRESSURE warning-light panel (1). Make sure that you do not touch the lamps (3) with your fingers.

[Rev.10 from 2021] 2026.04.01 01:49:03 UTC