Removal of the Fan Exit Liner Segments [PW11]

TASK 72-21-08-000-801-A
Removal of the Fan Exit Liner Segments

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.

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 1M(3 FT)
No specific	AR	COVER - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Fan Exit Liner Segments
Fan Exit Liner Segments
Fan Exit Liner Segments
Fan Exit Liner Segments

3. Job Set-up
Subtask 72-21-08-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 72-21-08-010-050-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 1M(3 FT) in position.

Subtask 72-21-08-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Maintenance

WARNING: MAKE SURE THAT YOU DO THE DEACTIVATION OF THE THRUST REVERSER BEFORE YOU DO MAINTENANCE WORK ON OR AROUND THE THRUST REVERSER. IF YOU DO NOT DO THIS PROCEDURE, THERE IS A RISK OF UNWANTED OPERATION AND THUS OF INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-21-08-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure

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

Subtask 72-21-08-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Fan Exit Liner Segments

CAUTION: USE THE CORRECT NASM 14191 TORQ-SET DRIVE BIT. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE SCREWS CAN OCCUR.

(1) Remove the fan exit liner segment (1) from the Compressor Intermediate Case (CIC) as follows:

Fan Exit Liner Segments ** ON A/C NOT FOR ALL

(a) Remove the 11 screws (2) from the liner segment (1) with the Bit.
(b) Remove the liner segment (1).
(2) Remove the two fan exit duct segments (13) and the two fan exit liner segments (12) from the CIC as follows:

Fan Exit Liner Segments ** ON A/C NOT FOR ALL

(a) Remove the 14 screws (2) from the two duct segments (13) with the Bit.
(b) Remove the two duct segments (13).
(c) Remove the 14 screws (2) from the two liner segments (12) with the Bit.
(d) Remove the two liner segments (12).
(3) Remove the two fan exit duct segments (13) and the two fan exit liner segments (12) from the CIC as follows:

Fan Exit Liner Segments ** ON A/C NOT FOR ALL

(a) Remove the 14 screws (2) from the two duct segments (13) with the Bit.
(b) Remove the two duct segments (13).
(c) Remove the 14 screws (2) from the two liner segments (12) with the Bit.
(d) Remove the two liner segments (12).
(4) Remove the fan exit duct segment (13) and the fan exit liner segment (25) from the CIC as follows:

Fan Exit Liner Segments ** ON A/C NOT FOR ALL

(a) Remove the seven screws (2) from the duct segment (13) with the Bit.
(b) Remove the duct segments (13).
(c) Remove the four screws (2) and the six screws (24) from the liner segment (25) with the Bit.
(d) Remove the liner segments (25).
(5) Make sure that you install all the necessary COVER - PROTECTION to prevent engine damage.

[Rev.10 from 2021] 2026.04.01 02:48:56 UTC