Installation of the Shroud Junction Fitting [CFML]

TASK 72-24-06-400-801-A
Installation 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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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)
No specific	Torque wrench: range to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )
No specific	Torque wrench: range to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	Graphite Mineral Vaseline

C. 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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Shroud Junction Fitting

3. Job Set-up
Subtask 72-24-06-941-051-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 72-24-06-010-052-A

B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 72-24-06-040-051-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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-24-06-010-053-A

D. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (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 72-24-06-420-050-A

A. Installation of the Shroud Junction Fittings
(1) Make sure that the mating surfaces are clean and clear of unwanted materials.
(2) Installation of the shroud junction fitting (10):
(a) Install the shroud junction fitting (10) in the correct position on segment shroud 5 (13) and strut 1 pad (left) (11).
(b) Lubricate the threads of the eight screws (12) with Graphite Mineral Vaseline (Material No.CP2101) .
(c) Install the eight screws (12) that attach the shroud junction fitting (10) to segment shroud 5 (13) and strut 1 pad (left) (11).
(d) TORQUE the eight screws (12) to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )

.
(3) Installation of the shroud junction fitting (14):
(a) Install the shroud junction fitting (14) in the correct position on segment shroud 1 (3) and strut 1 pad (right) (15).
(b) Lubricate the threads of the eight screws (16) with Graphite Mineral Vaseline (Material No.CP2101) .
(c) Install the eight screws (16) that attach the shroud junction fitting (14) to segment shroud 1 (3) and strut 1 pad (right) (15).
(d) TORQUE the eight screws (16) to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )

.
(4) Installation of the shroud junction fitting (2A or 2B):
(a) Install the shroud junction fitting (2A or 2B) in the correct position on segment shroud 2 (6) and segment shroud 3 (9).
PRE LEAP-1A SB 72-0232
(b) Lubricate the threads of the two bolts (7) and the eight screws (8) with Graphite Mineral Vaseline (Material No.CP2101) .
END PRE LEAP-1A SB 72-0232
POST LEAP-1A SB 72-0232
(c) Lubricate the threads of the eight screws (8) with Graphite Mineral Vaseline (Material No.CP2101) .
END POST LEAP-1A SB 72-0232
(d) Install the eight screws (8) that attach the shroud junction fitting (2A or 2B) to segment shroud 2 (6) and segment shroud 3 (9) and tighten them by hand.
(e) TORQUE the eight screws (8) to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )

.
PRE LEAP-1A SB 72-0232
(f) Install the two bolts (7) that attach the shroud junction fitting (2A) to segment shroud 2 (6) and segment shroud 3 (9) and tighten them by hand.
(g) TORQUE the two bolts (7) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
END PRE LEAP-1A SB 72-0232
(5) Installation of the shroud junction fitting (1A or 1B):
(a) Install the shroud junction fitting (1A or 1B) in the correct position on segment shroud 1 (3) and segment shroud 2 (6).
PRE LEAP-1A SB 72-0232
(b) Lubricate the threads of the two bolts (4) and the eight screws (5) with Graphite Mineral Vaseline (Material No.CP2101) .
END PRE LEAP-1A SB 72-0232
POST LEAP-1A SB 72-0232
(c) Lubricate the threads of the eight screws (5) with Graphite Mineral Vaseline (Material No.CP2101) .
END POST LEAP-1A SB 72-0232
(d) Install the eight screws (5) that attach the shroud junction fitting (1A or 1B) to segment shroud 1 (3) and segment shroud 2 (6) and tighten them by hand.
(e) TORQUE the eight screws (5) to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )

.
PRE LEAP-1A SB 72-0232
(f) Install the two bolts (4) that attach the shroud junction fitting (1A) to segment shroud 1 (3) and segment shroud 2 (6) and tighten them by hand.
(g) TORQUE the two bolts (4) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
END PRE LEAP-1A SB 72-0232

5. Close-up
Subtask 72-24-06-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 72-24-06-440-050-A

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 72-24-06-410-051-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:53:00 UTC