Installation of Upper Fan Case Dual Channel Thermocouple [CFML]

TASK 77-22-11-400-801-A
Installation of Upper Fan Case Dual Channel Thermocouple

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: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.40 and 1.20 m.daN (123.89 and 106.19 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

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 73-29-00-710-802-A	FADEC Test (Menu Mode)
Upper Fan Case Dual Channel Thermocouple

3. Job Set-up
Subtask 77-22-11-941-051-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) 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 77-22-11-010-051-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
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure
Subtask 77-22-11-420-050-A

A. Installation of the Upper Fan Case Dual Channel Thermocouple
(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Install the thermocouple (1) on the support bracket (4) as follows:
(a) Lubricate the threads of the bolts (5) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(b) Install the three bolts (5) to attach the thermocouple (1) to the bracket (4).
(c) TORQUE the three bolts (5) to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )

.
(3) Connect electrical connector No. 1 (3) and electrical connector No. 2 (2) to the thermocouple (1) (Ref. AMM TASK 70-70-00-910-804).

5. Close-up
Subtask 77-22-11-410-050-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 access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 77-22-11-710-050-A

B. Return to Service Testing
(1) Do the FADEC test (menu mode) (Ref. AMM TASK 73-29-00-710-802).

[Rev.10 from 2021] 2026.04.02 06:37:55 UTC