Removal of the Proximity Switches of the FWD Emergency Exits

TASK 52-73-11-000-003-A
Removal of the Proximity Switches of the FWD Emergency Exits

ZONE: 241
ZONE: 242
FIN: 5WN1 ** ON A/C NOT FOR ALL
FIN: 5WN2 ** ON A/C NOT FOR ALL

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	1	WRENCH - SPANNER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
241	CENTER PASSENGER COMPARTMENT
242	CENTER PASSENGER COMPARTMENT
831, 841
FOR [5WN1] (PROX SW-HANDLE, L FWD EMER EXIT ESC SLIDE)
241LW
FOR [5WN2] (PROX SW-HANDLE, R FWD EMER EXIT ESC SLIDE)
242LW

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-10-00-010-001-A	Opening of the Passenger/Crew Door
Proximity Switches (5WN1, 5WN2) of the FWD Emergency Exits
FOR [5WN1] (PROX SW-HANDLE, L FWD EMER EXIT ESC SLIDE)
TASK 25-23-47-000-002-A	Removal of the Upper Sidewall Panel Assy 241LW, (242LW), 241CW, (242CW) and 241FW, (242FW)
FOR [5WN2] (PROX SW-HANDLE, R FWD EMER EXIT ESC SLIDE)
TASK 25-23-47-000-002-A	Removal of the Upper Sidewall Panel Assy 241LW, (242LW), 241CW, (242CW) and 241FW, (242FW)

3. Job Set-up
Subtask 52-73-11-861-054-A ** ON A/C NOT FOR ALL

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

Subtask 52-73-11-010-052-A ** ON A/C NOT FOR ALL

B. Get Access

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

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 an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position in front of the applicable FWD passenger/crew door
(2) Open the FWD applicable passenger/crew door 831 or 841 (Ref. AMM TASK 52-10-00-010-001).

Subtask 52-73-11-865-056-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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 52-73-11-420-060-A ** ON A/C NOT FOR ALL

D. Disarming of the Escape Side of the Emergency Exits

Proximity Switches (5WN1, 5WN2) of the FWD Emergency Exits ** ON A/C NOT FOR ALL

(1) Disarm the escape slide of the emergency exits (9) as follows:
(a) Open and remove the flaps (7).

NOTE: The white SLIDE ARMED indicator light (10) comes on.

(b) Turn the head of the latch pin (8) with a WRENCH - SPANNER a quarter turn counterclockwise to retract the latch pin (8).

NOTE: The white SLIDE ARMED indicator light (10) goes off.

Subtask 52-73-11-010-060-A ** ON A/C NOT FOR ALL

E. Removal of the Lining Panel
(1) Disconnect the electrical connector from the SLIDE ARMED indicator light.
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the lining panel:
(a) FOR [5WN1] (PROX SW-HANDLE, L FWD EMER EXIT ESC SLIDE)
241LW (Ref. AMM TASK 25-23-47-000-002).
(b) FOR [5WN2] (PROX SW-HANDLE, R FWD EMER EXIT ESC SLIDE)
242LW (Ref. AMM TASK 25-23-47-000-002).
(4) Remove the insulation blanket.

4. Procedure
Subtask 52-73-11-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Proximity Switch

Proximity Switches (5WN1, 5WN2) of the FWD Emergency Exits ** ON A/C NOT FOR ALL

(1) Disconnect the electrical connector (1) from the proximity switch (2).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove and discard the lockwire.
(4) Remove the nut (5) and the washer (4).
(5) Remove the proximity switch (2).

[Rev.10 from 2021] 2026.04.02 06:28:35 UTC