Removal of the Roller and Proximity Switch Mechanism

TASK 52-11-31-000-004-A
Removal of the Roller and Proximity Switch Mechanism

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 4M (13 FT)-ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
831, 831CZ, 831DZ, 831EZ, 841, 841CZ, 841DZ, 841EZ

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
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
Roller and Proximity Switch Mechanism

3. Job Set-up
Subtask 52-11-31-861-051-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 52-11-31-010-058-A

B. Get Access

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.

(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the zone 831 (841).
(2) Open the fwd passenger/crew door 831 ( 841) (Ref. AMM TASK 52-10-00-010-001).
(3) Obey the special precautions before you start work on the door (Ref. AMM TASK 52-10-00-860-001).

Subtask 52-11-31-865-061-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	EIS/SLIDES/ARM AND WARN/FLT	15WN	P11
121VU	EIS/SLIDES/ARM AND WARN/GND	13WN	P10
121VU	EIS/SDAC1 AND 2/DOOR/DET/PAX	48WV	P05

Subtask 52-11-31-010-059-A

D. Removal of Components
(1) Remove the door lining panels (Ref. AMM TASK 25-23-46-000-001):
(a) For the left door:
831EZ 831DZ 831CZ.
(b) For the right door:
841EZ 841DZ 841CZ.
(2) Remove the door insulation blankets.

4. Procedure
Subtask 52-11-31-020-060-B

A. Removal of the Roller and Proximity Switch Mechanism

Roller and Proximity Switch Mechanism

(1) Remove the two nuts (28), the two bolts (24) and the two washers (25).
(2) Disconnect the electrical connector of the proximity switch (26).
(3) Put CAP - BLANKING on the disconnected electrical connectors.
(4) Remove the fitting (27) and the proximity switch (26).
(5) Remove and discard the cotter pin (15).
(6) Remove the nut (14) and the bolt (8).
(7) Remove the bushes (13) and (9) and the washer (10).
(8) Remove the eccentric yoke (12) and the roller (11).
(9) Remove the nut (4), the bolt (16) and the washer (17).
(10) Remove the lever (6) and the shouldered bushes (5) and (18).
(11) Remove the spacer (19).
(12) Remove the bellcrank (30) and the spring (29).
(13) Remove the bolt (23) and the washer (22).
(14) Remove and discard the cotter pin (1).
(15) Remove the washer (3) and the pin (2).
(16) Remove and discard the rivet (7), the trunnion (21) and the spring (20).

[Rev.10 from 2021] 2026.04.02 06:27:25 UTC