Installation of the Nacelle Anti-Ice Fan Case Thermocouple

TASK 30-21-24-400-801-A
Installation of the Nacelle Anti-Ice Fan Case Thermocouple

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS 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.

FIN: 4160KS ** 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	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )
No specific	Torque wrench: range to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
448AR

C. 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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-21-00-710-806-A	Test No.7 - EEC Operation Test (Self Test)
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
Fan Case Thermocouple

3. Job Set-up
Subtask 30-21-24-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did 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 30-21-24-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the right fan cowl door is open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure

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

Subtask 30-21-24-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Nacelle Anti-Ice Fan Case Thermocouple
(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine and adjacent components.
(2) Install the fan case thermocouple (1) 4001DD.
(a) Remove the protective caps from the 4113VC-A electrical connector and the connector on the fan case harness.
(b) Connection of the 4113VC-A electrical connector

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR IS CLEAN BEFORE YOU CONNECT IT. DIRTY ELECTRICAL CONNECTORS CAN CAUSE THE THERMOCOUPLE TO OPERATE INCORRECTLY.

CAUTION: USE PLIERS THAT HAVE TEFLON JAWS TO TIGHTEN OR LOOSEN THE ELECTRICAL CONNECTORS. DO NOT USE PLIERS THAT HAVE METAL JAWS. METAL JAWS CAN CAUSE DAMAGE TO THE ELECTRICAL CONNECTORS.

1 Connect the 4113VC-A electrical connector on the fan case thermocouple (1) to the connector on the fan case harness. Tighten the connector with your fingers. Then tighten the connector 1/8 to 1/4 of a turn more with PLIERS - JAWED, SOFT.
(c) Attach the thermocouple end of the fan case thermocouple (1) to the electrical bracket on the fan case. Use the two bolts (5) and two washers (6).
(d) TORQUE the bolts (5) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

.
(e) Attach the fan case thermocouple (1) to the electrical brackets on the fan case. Use the three bolts (4), three washers (3), and three clamps (2).
(f) Make sure there is a maximum clearance between the fan case thermocouple (1) and adjacent components.
(g) Adjust the fan case thermocouple (1) to keep the preload to a minimum. TORQUE the bolts (4) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

Subtask 30-21-24-720-050-A ** ON A/C NOT FOR ALL

B. Do a EEC operation test (Self Test) (Test No.7) (Ref. AMM TASK 73-21-00-710-806).

5. Close-up
Subtask 30-21-24-410-050-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 right fan cowl door (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(5) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).

[Rev.10 from 2021] 2026.04.01 00:29:18 UTC