Installation of the T25 Temperature Sensor [CFMI]

TASK 73-21-20-400-001-A
Installation of the T25 Temperature Sensor

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
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 92 and 85 lbf.in (1.04 and 0.96 m.daN )
No specific	Torque wrench: range to between 114 and 96 lbf.in (1.29 and 1.08 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors

3. Job Set-up
Subtask 73-21-20-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 73-21-20-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the right thrust reverser door is open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 73-21-20-040-051-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 73-21-20-420-050-A ** ON A/C NOT FOR ALL

A. Install the T25 sensor.
(1) Remove the blanking cap from electrical connector and blanking plug from sensor housing.
(2) Install T25 sensor into port in fan frame. Make sure that centering pin (30) engages correctly its recess.

Subtask 73-21-20-420-051-A ** ON A/C NOT FOR ALL

B. Apply a thin layer of graphite grease (Material No.CP2101) to the threads of 4 captive bolts (10). Attach the T25 sensor (20) with the 4 bolts. TORQUE the bolts to between 114 and 96 lbf.in (1.29 and 1.08 m.daN )

.
(1) Connect the CJ11R and CJ12R harness connectors to the sensor.

Subtask 73-21-20-410-051-A ** ON A/C NOT FOR ALL

C. Install the fan duct panel as follows:
(1) Apply a thin layer of graphite grease (Material No.CP2101) to the threads of 4 bolts.
(2) Set and attach the fan duct panel with 4 bolts.
(3) TORQUE the 4 bolts. to between 92 and 85 lbf.in (1.04 and 0.96 m.daN )

Subtask 73-21-20-410-054-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust reverser door: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 73-21-20-440-050-A ** ON A/C NOT FOR ALL

E. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)

Subtask 73-21-20-710-051-A ** ON A/C NOT FOR ALL

F. Do a FADEC ground test (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040)

5. Close-up
Subtask 73-21-20-410-050-A ** ON A/C NOT FOR ALL

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 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:56:02 UTC