Removal of the T2 Probe [PW11]

TASK 71-61-12-000-801-A
Removal of the T2 Probe

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

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

ZONE: 400

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	COVER - PROTECTION
No specific	1	PLIERS - JAWED, SOFT
No specific	1	SCRAPER - NON METALLIC

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0028)	tying tape
(Material No.PU1-0049)	teflon fiberglass lacing tape
(Material No.PU1-0092)	lacing tape

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-61-11-000-801-A	Removal of the Aft Bulkhead T2 Panel
T2 Probe

3. Job Set-up
Subtask 71-61-12-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 71-61-12-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 71-61-12-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the T2 Probe
(1) Remove the T2 probe (1) from the inlet cowl as follows:
(a) Remove the aft bulkhead T2 panel (Ref. AMM TASK 71-61-11-000-801).
(b) Disconnect the wiring harness connector (D1000P) from the T2 probe (1) with the PLIERS - JAWED, SOFT.
(c) Install COVER - PROTECTION on the wiring harness connector (D1000P) and the T2 probe (1).
(d) Temporarily attach the wiring harness (D1000P) to the engine structure with tying tape (Material No.PU1-0028) or equivalent.

NOTE: You can use teflon fiberglass lacing tape (Material No.PU1-0049) or lacing tape (Material No.PU1-0092) as an alternative to tying tape (Material No.PU1-0028) .

(e) Remove the sealant on the bolt (2), washers (3), nut (5) and ground wire (4) lug on the T2 probe with a SCRAPER - NON METALLIC.
(f) Remove the bolt (2), two washers (3), ground wire (4) and nut (5) from the T2 probe (1).
(g) Remove the four nuts (6) that attach the T2 probe (1) to the inlet cowl.
(h) Remove the T2 probe (1) from the inlet cowl.
(2) Installation of the protection covers:

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 12:57:35 UTC