Removal of the Shroud Junction Fitting [CFML]

TASK 72-24-06-000-801-A
Removal of the Shroud Junction Fitting

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, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 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
Shroud Junction Fitting

3. Job Set-up
Subtask 72-24-06-941-050-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 WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
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 72-24-06-010-050-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 72-24-06-040-050-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 72-24-06-010-051-A

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

4. Procedure
Subtask 72-24-06-020-050-A

A. Removal of the Shroud Junction Fittings
(1) Removal of the shroud junction fitting (1A or 1B):
PRE LEAP-1A SB 72-0232
(a) Remove the two bolts (4) that attach the shroud junction fitting (1A) to segment shroud 1 (3) and segment shroud 2 (6).
END PRE LEAP-1A SB 72-0232
(b) Remove the eight screws (5) that attach the shroud junction fitting (1A or 1B) to segment shroud 1 (3) and segment shroud 2 (6).
(2) Removal of the shroud junction fitting (2A or 2B):
PRE LEAP-1A SB 72-0232
(a) Remove the two bolts (7) that attach the shroud junction fitting (2A) to segment shroud 2 (6) and segment shroud 3 (9).
END PRE LEAP-1A SB 72-0232
(b) Remove the eight screws (8) that attach the shroud junction fitting (2A or 2B) to segment shroud 2 (6) and segment shroud 3 (9).
(3) Removal of the shroud junction fitting (10):
(a) Remove the eight screws (12) that attach the shroud junction fitting (10) to segment shroud 5 (13) and strut 1 pad (left) (11).
(4) Removal of the shroud junction fitting (14):
(a) Remove the eight screws (16) that attach the shroud junction fitting (14) to segment shroud 1 (3) and strut 1 pad (right) (15).

[Rev.10 from 2021] 2026.04.01 13:04:08 UTC