Installation of the Proximity Switches of the FWD Emergency Exits

TASK 52-73-11-400-003-A
Installation 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	1	WRENCH - SPANNER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. 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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 52-10-00-410-001-A	Closing of the Passenger/Crew Door
TASK 52-71-00-820-009-A	Adjustment of the Proximity Switches of the Emergency Exits
TASK 52-73-00-710-002-A	Operational Test of the Warning System Related to the Emergency Exit Doors
Proximity Switches (5WN1, 5WN2) of the FWD Emergency Exits
FOR [5WN1] (PROX SW-HANDLE, L FWD EMER EXIT ESC SLIDE)
TASK 25-23-47-400-002-A	Installation 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 25-23-47-400-002-A	Installation of the Upper Sidewall Panel Assy 241LW, (242LW), 241CW, (242CW) and 241FW, (242FW)

3. Job Set-up
Subtask 52-73-11-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the access platform is in position.

Subtask 52-73-11-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 52-73-11-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Proximity Switch

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

(1) Install the proximity switch (2) on the support (3).
(2) Install the washer (4) and the nut (5).
(3) Tighten the nut (5). Safety it with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(4) Remove the blanking cap from the electrical connector (1).
(5) Connect the electrical connector (1) to the proximity switch (2).
(6) Adjust the proximity switch (2) (Ref. AMM TASK 52-71-00-820-009).

Subtask 52-73-11-865-058-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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 52-73-11-710-055-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do an operational test of the warning system of the emergency exit (Ref. AMM TASK 52-73-00-710-002).

5. Close-up
Subtask 52-73-11-410-062-A ** ON A/C NOT FOR ALL

A. Installation of the Lining Panel
(1) Install the insulation blanket.
(2) Install the lining panel:
(a) FOR [5WN2] (PROX SW-HANDLE, R FWD EMER EXIT ESC SLIDE)
242LW (Ref. AMM TASK 25-23-47-400-002).
(b) FOR [5WN1] (PROX SW-HANDLE, L FWD EMER EXIT ESC SLIDE)
241LW (Ref. AMM TASK 25-23-47-400-002).

Subtask 52-73-11-420-062-A ** ON A/C NOT FOR ALL

B. Arming of the Escape Slide of the Emergency Exits

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

(1) Arm the escape slide of the emergency exits (9) as follows:
(a) With a WRENCH - SPANNER, turn the head of the latch pin (8), a quarter turn clockwise to extend the latch pin (8).

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

(b) Install and close the flaps (7) on the emergency exits (9).

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

Subtask 52-73-11-410-052-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable FWD passenger/crew door 831 or 841 (Ref. AMM TASK 52-10-00-410-001).
(3) Remove the access platform(s).

Subtask 52-73-11-862-055-A ** ON A/C NOT FOR ALL

D. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 01:48:35 UTC