Installation of the Electrical Tertiary Lock Proximity Sensors [CFML]

TASK 78-37-52-400-802-A
Installation of the Electrical Tertiary Lock Proximity Sensors

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.

FIN: 4134EG
FIN: 4135EG

1. Reason for the Job
This procedure gives the instructions to install the proximity sensors on the tertiary lock proximity sensors.
There are two proximity sensors:

The channel A proximity sensor (4134EG) is in the lower position.
The channel B proximity sensor (4135EG) is in the upper position.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.34 and 0.23 m.daN (30.09 and 20.35 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
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 73-29-00-740-804-A	Thrust Reverser Cycling Test (Menu Mode)
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Tertiary Lock Proximity Sensors

3. Job Set-up
Subtask 78-37-52-941-053-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) 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 in position to tell persons not to energize FADEC 1(2).

Subtask 78-37-52-010-057-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

Subtask 78-37-52-040-053-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-37-52-010-058-A

D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

4. Procedure
Subtask 78-37-52-420-051-A

A. Installation of the Tertiary Lock Channel A Proximity Sensor
(1) Remove the COVER - PROTECTION and CAP - PROTECTION from all the receptacles and connectors.
(2) Lubricate the threads of the two bolts (10) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put the proximity sensor (4134EG) (3) in position on the tertiary lock (9).
(4) Attach the proximity sensor (4134EG) (3) to the tertiary lock (9) with two bolts (10).
(5) TORQUE the two bolts (10) to between 0.34 and 0.23 m.daN (30.09 and 20.35 lbf.in )

.
(6) Connect the channel A electrical connector (4134KS) (5) to the proximity sensor (4134EG) (3) (Ref. AMM TASK 70-70-00-910-804).
(7) Connect the electrical connector (8) to the solenoid (7) on the tertiary lock (9) (Ref. AMM TASK 70-70-00-910-804).

Subtask 78-37-52-420-052-A

B. Installation of the Tertiary Lock Channel B Proximity Sensor
(1) Remove the COVER - PROTECTION and CAP - PROTECTION from all the receptacles and connectors.
(2) Lubricate the threads of the two bolts (11) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put the proximity sensor (4135EG) (2) in position on the tertiary lock (9).
(4) Attach the proximity sensor (4135EG) (2) to the tertiary lock (9) with two bolts (11).
(5) TORQUE the two bolts (11) to between 0.34 and 0.23 m.daN (30.09 and 20.35 lbf.in )

.
(6) Connect the channel B electrical connector (4135KS) (6) to the proximity sensor (4135EG) (2) (Ref. AMM TASK 70-70-00-910-804).
(7) Connect the electrical connector (8) to the solenoid (7) on the tertiary lock (9) (Ref. AMM TASK 70-70-00-910-804).

5. Close-up
Subtask 78-37-52-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 78-37-52-440-051-A

B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-37-52-740-050-A

C. Test
(1) Do the thrust reverser cycling test (Ref. AMM TASK 73-29-00-740-804).

Subtask 78-37-52-410-052-A

D. Close Access
(1) 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
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:37:29 UTC