Installation of the Strut 6 [CFML]

TASK 72-24-03-400-803-A
Installation of the Strut 6

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	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 92.4 and 83.6 lbf.in (1.04 and 0.94 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 grease
(Material No.CP2773)	CA1010 Mastinox chromate free jointing compound

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, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 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 72-24-01-400-801-A	Installation of Segment Shrouds 1 thru 5
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
Strut 6

3. Job Set-up
Subtask 72-24-03-941-063-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
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 72-24-03-010-075-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

Subtask 72-24-03-040-063-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 72-24-03-010-076-A

D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (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 72-24-03-420-055-A

A. Installation of Strut 6
(1) Install strut 6 (3):

NOTE: Check that the seal (18) is in the good position before the strut 6 (3) installation

(a) Make sure that the mating faces are clean and clear of unwanted materials.
(b) Install the spacers:

CAUTION: WHEN YOU INSTALL THE SPACERS AGAIN, MAKE SURE THAT YOU REFER TO THE POSITIONS THAT YOU RECORDED DURING THE REMOVAL. IF YOU DO NOT INSTALL EACH SPACER IN ITS INITIAL POSITION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

1 Install the two spacers (17) and the two spacers (16) on strut 6 (3). Refer to the positions that you recorded during the removal.
(c) Install strut 6 (3) in the correct position on the engine.
(d) Lubricate the threads of the two screws (4) with the graphite grease (Material No.CP2101) .
(e) Install the two screws (4) to attach strut 6 (3) to the strut 6 fairing support (5).
(f) TORQUE the two screws (4) to between 84 and 76 lbf.in (0.95 and 0.86 m.daN )

.
(g) Apply the CA1010 Mastinox chromate free jointing compound (Material No.CP2773) on the threads of the two bolts (9).
(h) Install the two bolts (9) and the two washers (10) to attach strut 6 (3) to the fan frame shroud (8) and tighten them by hand.
(i) TORQUE the two bolts (9) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
(j) Apply the CA1010 Mastinox chromate free jointing compound (Material No.CP2773) on the threads of the two bolts (6).
(k) Install the two bolts (6) and the two washers (7) to attach strut 6 (3) to the fan frame shroud (8) and tighten by hand.
(l) TORQUE the two bolts (6) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
(m) Lubricate the threads of the two bolts (14) with the graphite grease (Material No.CP2101) .
(n) Install the two bolts (14) to attach strut 6 (3) to the fan hub (15) and tighten them by hand.
(o) TORQUE the two bolts (14) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
(p) Carefully install the seal (12) and the plate (13) on strut 6 (3).
(q) Install the eight bolts (11) on the seal (12) and the plate (13) and tighten them by hand.
(r) TORQUE the eight bolts (11) to between 92.4 and 83.6 lbf.in (1.04 and 0.94 m.daN )

.
(2) Install segment shroud 5 (2) (Ref. AMM TASK 72-24-01-400-801).
(3) Install segment shroud 4 (1) (Ref. AMM TASK 72-24-01-400-801).

5. Close-up
Subtask 72-24-03-410-071-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 72-24-03-440-061-A

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

Subtask 72-24-03-410-072-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:52:44 UTC