Installation of the Proximity Switches of the FWD Passenger/Crew Doors

TASK 52-73-11-400-001-A
Installation of the Proximity Switches of the FWD Passenger/Crew Doors

ZONE: 831
ZONE: 841
FIN: 4WN1
FIN: 4WN2

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Consumable Materials

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

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
831	FORWARD PASSENGER/CREW DOOR
841	FORWARD PASSENGER/CREW DOOR
831, 841
FOR [4WN1] (PROX SW-HANDLE, L FWD ESC SLIDE)
831CZ
FOR [4WN2] (PROX SW-HANDLE, R FWD ESC SLIDE)
841CZ

C. 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 52-10-00-860-001-A	Special Precautions before Work on the Passenger/Crew Door
TASK 52-10-00-860-002-A	Special Precautions after Work on the Passenger/Crew Door
TASK 52-71-00-820-002-A	Adjustment of the Proximity Switches of the Passenger/Crew Doors with the Doors Checking Tool
TASK 52-71-00-820-002-A-01	Adjustment of the Proximity Switches of the Passenger/Crew Doors with the ECAM Display Unit (DU)
TASK 52-73-00-710-001-A	Operational Test of the Emergency Escape-Slide Release-System of the Passenger/Crew Doors
Proximity Switches (4WN1, 4WN2) of the Passenger/Crew Door
FOR [4WN1] (PROX SW-HANDLE, L FWD ESC SLIDE)
TASK 25-23-46-400-001-A	Installation of the Door Linings on the Forward Passenger/Crew Doors
FOR [4WN2] (PROX SW-HANDLE, R FWD ESC SLIDE)
TASK 25-23-46-400-001-A	Installation of the Door Linings on the Forward Passenger/Crew Doors

3. Job Set-up
Subtask 52-73-11-860-053-A

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 safety precautions are obeyed (Ref. AMM TASK 52-10-00-860-001).
(3) Make sure that the access platform is in position.

Subtask 52-73-11-865-051-A

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

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

4. Procedure
Subtask 52-73-11-420-050-A

A. Installation of the Proximity Switch

Proximity Switches (4WN1, 4WN2) of the Passenger/Crew Door

(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 52-71-00-820-002).

Subtask 52-73-11-865-052-A

B. Remove the safety clip(s) and the tag(s) and close 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 52-73-11-710-053-A

C. Operational Test
(1) Do an operational test of the emergency escape slide release system of the FWD passenger/crew door (Ref. AMM TASK 52-73-00-710-001).

5. Close-up
Subtask 52-73-11-410-060-A

A. Installation of the Door Lining Panel
(1) Install the insulation blanket.
(2) Install the door lining panel:
(a) FOR [4WN2] (PROX SW-HANDLE, R FWD ESC SLIDE)
841CZ (Ref. AMM TASK 25-23-46-400-001)
(b) FOR [4WN1] (PROX SW-HANDLE, L FWD ESC SLIDE)
831CZ (Ref. AMM TASK 25-23-46-400-001).

Subtask 52-73-11-410-050-A

B. Close Access
(1) Obey the special precautions after the work on the door (Ref. AMM TASK 52-10-00-860-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the applicable FWD passenger/crew door 831 or 841 (Ref. AMM TASK 52-10-00-410-001).
(4) Remove the access platform(s).

Subtask 52-73-11-862-052-A

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

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