Installation of the Fan Cowl Keeper Proximity Sensor [CFML]

TASK 71-13-51-400-801-A
Installation of the Fan Cowl Keeper Proximity Sensor

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400
FIN: 4231KS
FIN: 4232KS
FIN: 4233KS

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	GAGE - FEELER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )
No specific	Torque wrench: range to between 1.27 and 0.73 m.daN (112.39 and 64.60 lbf.in )
No specific	Torque wrench: range to between 1.16 and 0.88 m.daN (102.65 and 77.88 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00338)	MASTINOX D40

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
10	LOCK WASHER	AIPC 71-13-10-21-040

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 71-13-13-720-803-A	Operational Test of the Fan Cowl Loss Prevention System
TASK 71-13-51-820-801-A	Rigging Procedure of the Fan Cowl Keeper Proximity Sensors
TASK 73-25-34-710-805-A	Operational Test of the Engine Interface Unit (with CFDS)
Fan Cowl Keeper Proximity Sensor
Fan Cowl Keeper Proximity Sensor

3. Job Set-up
Subtask 71-13-51-941-051-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to energize FADEC 1(2).

Subtask 71-13-51-010-051-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.

4. Procedure
Subtask 71-13-51-420-050-A

A. Installation of the Fan Cowl Keeper Proximity Sensor (PRE SPOL BD-FC-19004)
(1) Remove the CAP - BLANKING from the fan cowl keeper proximity sensor (7).
(2) Put the fan cowl keeper proximity sensor (7) in position in the housing with the nut (11), washer (9) and peeling washer (8).

NOTE: Install the peeling washer (8) in the same position as before.

NOTE: At this step do not install the new AIPC 71-13-10-21-040 LOCK WASHER (10).

(3) In this position, tighten the nut (11) to attach the fan cowl keeper proximity sensor (7).
(4) Remove the CAP - BLANKING from the latches monitoring harness connector (6).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(5) Connect the latches monitoring harness connectors (6) to the fan cowl keeper proximity sensor (7):
(a) Carefully connect the latches monitoring harness connectors (6) to the fan cowl keeper proximity sensor (7).
(b) Turn the connector nut clockwise until get connection.

NOTE: The connector must not hide the red mark on the proximity sensor.

(c) Tighten the latches monitoring harness connectors (6) by hand:
1 Turn clockwise each connector until the red mark of the proximity sensor is hidden.
2 When the red marking is hidden, turn each connector by hand until you hear two "clicks".
(6) Plug the latches monitoring harness connector (6) with the fan cowl keeper proximity sensor (7).
(7) Check the relative position of the target with the fan cowl keeper proximity sensor (7).
(a) When the keeper is in the closed position, the target is in front of the fan cowl keeper proximity sensor (7).
(b) When the keeper is in the open position, the target has any part in front of the fan cowl keeper proximity sensor (7).
1 If a misrigging of the target is detected, do a full target rigging procedure (Ref. AMM TASK 71-13-51-820-801).
(8) With the keeper in the closed position, measure the gap with a GAGE - FEELER between the sensor and the target. The gap must be to between 2 +0.1 mm or -0.4 mm (0.079 +0.004 in. or -0.016 in.).
(9) Remove the nut (11).
(10) Put in position the new AIPC 71-13-10-21-040 LOCK WASHER (10) and the nut (11) on the fan cowl keeper proximity sensor (7).
(11) Tighten the nut (11) to get contact with the locking washer (10).
(12) TORQUE the nut (11) to between 1.27 and 0.73 m.daN (112.39 and 64.60 lbf.in )

.
(13) Bend the AIPC 71-13-10-21-040 LOCK WASHER (10).

Subtask 71-13-51-420-055-A

B. Installation of the Fan Cowl Keeper Proximity Sensor (POST SPOL BD-FC-19004)
(1) Remove the CAP - BLANKING from the fan cowl keeper proximity sensor (7).
(2) Put the fan cowl keeper proximity sensor (7) in position in the housing with the nut (11), washer (9) and peeling washer (8).

NOTE: Install the peeling washer (8) in the same position as before.

NOTE: At this step do not install the nut (10).

(3) In this position, tighten the nut (11) to attach the fan cowl keeper proximity sensor (7).
(4) Remove the CAP - BLANKING from the latches monitoring harness connector (6).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

NOTE: The connector must not hide the red mark on the proximity sensor.

(c) Tighten the latches monitoring harness connectors (6) by hand:
1 Turn clockwise each connector until the red mark of the proximity sensor is hidden.
2 When the red marking is hidden, turn each connector by hand until you hear two "clicks".
(6) Plug the latches monitoring harness connector (6) with the fan cowl keeper proximity sensor (7).
(7) Check the relative position of the target with the fan cowl keeper proximity sensor (7).
(a) When the keeper is in the closed position, the target is in front of the fan cowl keeper proximity sensor (7).
(b) When the keeper is in the open position, the target has any part in front of the fan cowl keeper proximity sensor (7).
1 If a misrigging of the target is detected, do a full target rigging procedure (Ref. AMM TASK 71-13-51-820-801).
(8) With the keeper in the closed position, measure the gap with a GAGE - FEELER between the sensor and the target. The gap must be to between 2 +0.1 mm or -0.4 mm (0.079 +0.004 in. or -0.016 in.).
(9) Remove the nut (11).
(10) Put in position the nut (10) and the nut (11) on the fan cowl keeper proximity sensor (7).
(11) Tighten the nut (11) to get contact with the nut (10).
(12) TORQUE the nut (11) to between 1.16 and 0.88 m.daN (102.65 and 77.88 lbf.in )

Subtask 71-13-51-820-052-A

C. Check and Adjustment of the Fan Cowl Door
(1) Do the operational test of the fan-cowl loss-prevention system (Ref. AMM TASK 71-13-13-720-803).

Subtask 71-13-51-420-051-A

D. Installation of the Sheet Metal Protection
(1) Put the sheet metal protections (1), (4) and (5) in position on the fan cowl door.
(2) Install the bolts (3) and washers (2).
(3) TORQUE the bolts (3) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(4) Brush-seal the fasteners with MASTINOX D40 (Material No.CPNCL00338) .

5. Close-up
Subtask 71-13-51-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).

Subtask 71-13-51-710-050-A

B. Test(s)
(1) Do the operational test of the engine interface unit (with CFDS) (Ref. AMM TASK 73-25-34-710-805).

[Rev.10 from 2021] 2026.04.02 06:33:23 UTC