Installation of the T3 Sensor [CFML]

TASK 73-21-25-400-801-A
Installation of the T3 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.

FIN: 4084KS

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 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70.2 and 59.8 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
No specific	Torque wrench: range to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
(Material No.CP2619)	Never Seez-Pure Nickel, Special
(Material No.CP8006)	safety cable 0.032 in. (0.8 mm) dia.

C. Work Zones and Access Panels

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

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)
TASK 75-22-05-400-801-A	Installation of the Low Pressure Turbine Active Clearance Control (LPT ACC) Valve
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
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
T3 Sensor (PRE and POST SB 72-0036 and PRE and POST SB 72-0268)

3. Job Set-up
Subtask 73-21-25-941-051-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, and
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 73-21-25-010-052-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 1M(3 FT) is in position.

Subtask 73-21-25-040-051-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 maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 73-21-25-010-053-A

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

4. Procedure
Subtask 73-21-25-020-051-A

A. Remove all COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.

Subtask 73-21-25-420-051-A

B. Installation of the T3 Sensor
(1) Apply CP2619Never Seez-Pure Nickel, Special on the threads of the T3 sensor (1).
(2) Install the T3 sensor (1) hand-tight in the combustion case threaded insert adapter (23).
(3) Apply engine oil (Material No.CP2442) to the threads of the bolt (3), bolts (7), bolt (11) and bolt (24).
(4) Install the bolt (24) that attaches the loop clamp (25) and the sensor (1) to the bracket (26) hand-tight.
(5) Install the bolt (11) that attaches the loop clamp (10) and the sensor (1) to the support bracket (8) and support bracket (9) hand-tight.
(6) Install the bolt (3) that attaches the loop clamp (4) and the T3 sensor (1) tube to the bracket (2) hand-tight.
(7) Install the two bolts (7) that attach the T3 sensor (1) to the bracket (2) hand-tight.
(8) Installation of the T3 sensor (1)

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) TORQUE the T3 sensor (1) at the combustion case threaded insert adapter (23) to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

and wirelock with CP8006safety cable 0.032 in. (0.8 mm) dia. or equivalent.
(9) TORQUE the two bolts (7) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )

.
(10) TORQUE the bolt (3), bolt (11) and bolt (24) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(11) Connect the electrical connector (5) and electrical connector (6) to the T3 sensor (1) (Ref. AMM TASK 70-70-00-910-804).
(12) Put the High Pressure Turbine (HPT) drain tube (13) in position and connect the HPT drain tube (13) hand-tight to the HPT Active Clearance Control (ACC) valve (15).
(13) Connect the HPT drain tube (18) B-nut hand-tight to the HPT drain tube (13).
(14) Apply engine oil (Material No.CP2442) on the threads of bolt (12), bolt (17) and bolt (20).
(15) Install the bolt (20) that attaches the loop clamp (21) and the HPT drain tube (13) to the support bracket (22) hand-tight.
(16) Install the bolt (17) that attaches the loop clamp (19) and the HPT drain tube (13) to the support bracket (16) hand-tight.
(17) Install the bolt (12) that attaches the loop clamp (14) and the HPT drain tube (13) to the support bracket (8) hand-tight.
(18) TORQUE the HPT drain tube (13) B-nut at the HPT ACC valve (15) to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(19) TORQUE the HPT drain tube (13) B-nut at the HPT drain tube (18) to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(20) TORQUE the bolt (12), bolt (17) and bolt (20) to between 70.2 and 59.8 lbf.in (0.79 and 0.68 m.daN )

.
(21) Install the Low Pressure Turbine (LPT) Active Clearance Control (ACC) valve (Ref. AMM TASK 75-22-05-400-801).

5. Close-up
Subtask 73-21-25-410-050-A

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

Subtask 73-21-25-440-050-A

B. Do the reactivation of the thrust reverser after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 73-21-25-710-050-A

C. Test(s)
(1) Do the FADEC test (menu mode) (Ref. AMM TASK 73-29-00-710-802).

Subtask 73-21-25-410-051-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 access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:07:08 UTC