Removal of the Strut 1 [CFML]

TASK 72-24-03-000-801-A
Removal of the Strut 1

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
Strut 1

3. Job Set-up
Subtask 72-24-03-941-050-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-24-03-010-050-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 72-24-03-040-050-A

C. Deactivation of the Thrust Reverser System for 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 maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-24-03-010-051-A

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

4. Procedure
Subtask 72-24-03-020-050-A

A. Removal of Strut 1 (1)
(1) Removal of the strut 1 fairing (right) (2):
(a) Remove the four screws (4) that attach the strut 1 fairing (right) (2) to the strut 1 pad (right) (3).
(b) Remove the screw (6) that attaches the strut 1 fairing (right) (2) to the strut 1 removable support (5).
(c) Remove the three screws (8) that attach the strut 1 fairing (right) (2) to the strut 1 fairing support (7).
(d) Remove the three screws (10) that attach the strut 1 fairing (right) (2) to the strut 1 outer fitting (9).
(e) Remove the strut 1 fairing (right) (2) from the engine.
(2) Removal of the strut 1 fairing (left) (11):
(a) Remove the four screws (13) that attach the strut 1 fairing (left) (11) to the strut 1 pad (left) (12).
(b) Remove the screw (14) that attaches the strut 1 fairing (left) (11) to the strut 1 removable support (5).
(c) Remove the three screws (15) that attach the strut 1 fairing (left) (11) to the strut 1 fairing support (7).
(d) Remove the three screws (16) that attach the strut 1 fairing (left) (11) to the strut 1 outer fitting (9).
(e) Remove the strut 1 fairing (left) (11) from the engine.
(3) Removal of the strut 1 pad (right) (3):
(a) Remove the four screws (18) that attach the strut 1 pad (right) (3) to the junction-shroud fitting (right) (17).
(b) Remove the two bolts (20) that attach the strut 1 pad (right) (3) to the fan frame hub (19).
(4) Removal of the strut 1 pad (left) (12):
(a) Remove the four screws (25) that attach the strut 1 pad (left) (12) to the junction-shroud fitting (left) (24).
(b) Remove the two bolts (26) that attach the strut 1 pad (left) (12) to the fan frame hub (19).
(5) Removal of the strut 1 removable support (5):
(a) Remove the two nuts (30) and the two bolts (31) that attach the strut 1 removable support (5) to the strut 1 fairing support (7).
(b) Remove the strut 1 removable support (5) from the engine.
(6) Removal of the strut 1 pad (right) (3) and the strut 1 pad (left) (12):
(a) Remove the nut (32) and the bolt (33) that attach the strut 1 pad (right) (3) and the strut 1 pad (left) (12).
(b) Remove the strut 1 pad (right) (3) from the engine.
(c) Remove the strut 1 pad (left) (12) from the engine.
(7) Removal of the extrados strut 1 seal (21):
(a) Remove the five screws (22) and the five nuts (23) from the strut pad (right) (3).
(b) Remove the extrados strut 1 seal (21) from the strut pad (right) (3) pulling carefully the three seal pins.
(8) Removal of the intrados strut 1 seal (27):
(a) Remove the five screws (28) and the five nuts (29) from the strut pad (left) (12).
(b) Remove the intrados strut 1 seal (27) from the strut pad (left) (12) pulling carefully the three seal pins.
(9) Removal of the Strut 1 outer fitting (9):
(a) Remove the two bolts (34) and the two flat washers (35) from the strut 1 fairing support (7).
(b) Remove the two bolts (36) from the engine.
(c) Remove the two bolts (37) and the two adjusting fitting shims (38) from the engine.
(d) Remove the strut 1 outer fitting (9) from the engine.

[Rev.10 from 2021] 2026.04.01 02:52:38 UTC