Removal of the Fan Case Externals [PW11]

TASK 72-21-01-000-803-A
Removal of the Fan Case Externals

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 2M (6 FT) - ADJUSTABLE
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 71-61-13-000-801-A	Removal of the Air Inlet Cowl Ground Straps
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
Removal of the Fan Case Externals

3. Job Set-up
Subtask 72-21-01-941-067-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 72-21-01-010-068-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 the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 72-21-01-040-054-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-21-01-010-069-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 AND ADJACENT COMPONENTS.

Subtask 72-21-01-000-050-A ** ON A/C NOT FOR ALL

A. Removal of the Fan Case Externals
(1) Remove the fan case externals as follows:
(a) Remove the two bolts (1) and the bushing (2) from the fan case support-ring.
(b) Remove the ground cable (WF52) (7) from the fan case as follows:
1 Remove the air inlet cowl ground cable from the ground cable (WF52) (7) flange A screw (9) (Ref. AMM TASK 71-61-13-000-801).
2 Remove the bolt (5), washer (4) and nut (6) from the fan case support-ring.
3 Remove the screw (9) and the nut (8) from fan case flange A.
4 Remove the five clamps (19) and the nuts (20) from the five studs.
5 Remove the ground cable (WF52) (7).
(c) Remove the ground cable (WF53) (3) from the fan case as follows:
1 Remove the air inlet cowl ground cable from the ground cable (WF53) (3) flange A screw (9) (Ref. AMM TASK 71-61-13-000-801).
2 Remove the bolt (5), washer (4) and nut (6) from the fan case support-ring.
3 Remove the screw (9) and the nut (8) from fan case flange A.
4 Remove the two clamps (19) and the nuts (20) from the two studs.
5 Remove the two clamps (19) and the bolts (5) from the two brackets.
6 Remove the ground cable (WF53) (3).
(d) Remove the ground cable (WF50) (29) from the fan case as follows:
1 Remove the air inlet cowl ground cable from the ground cable (WF50) (29) flange A screw (9) (Ref. AMM TASK 71-61-13-000-801).
2 Remove the bolt (5), washer (4) and nut (6) from the fan case support-ring.
3 Remove the screw (9) and the nut (8) from fan case flange A.
4 Remove the two clamps (19) and the nuts (20) from the two brackets and the studs.
5 Remove the four clamps (19) and the nuts (20) from the four studs.
6 Remove the ground cable (WF50) (29).
(e) Remove the two bolts (1) and the bushing (2) from the fan case support-ring.
(f) Remove the ground cable (WF51) (39) from the fan case as follows:
1 Remove the air inlet cowl ground cable from the ground cable (WF51) (39) flange A screw (9) (Ref. AMM TASK 71-61-13-000-801).
2 Remove the bolt (5), washer (4) and nut (6) from the fan case support-ring.
3 Remove the screw (9) and the nut (8) from fan case flange A.
4 Remove the two clamps (19) and the nuts (20) from the two brackets and studs.
5 Remove the two clamps (19) and the nuts (20) from the two studs.
6 Remove the two clamps (19), the four nuts (20) and the bracket (49) from the four studs.
7 Remove the ground cable (WF51) (39).
(g) Remove the four bolts (60) and the plate (61) from the bracket (59).
(h) Remove the three nuts (20) and the bracket (59) from the three studs.
(i) Remove the 20 bolts (60), the six plates (62) and the plate (63) from the bracket (64).
(j) Remove the four nuts (20) and the bracket (64) from the four studs.
(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 02:48:19 UTC