Installation of the Rear Mount Fairing (RMF) Assembly

TASK 54-57-22-400-818-A
Installation of the Rear Mount Fairing (RMF) Assembly

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

ZONE: 470
ZONE: 480
FIN: 4020KM1
FIN: 4020KM2

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON
415BL, 415BR, 425BL, 425BR, 473AL, 473AR, 483AL, 483AR
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 54-51-21-400-803-A	Installation of the Pylon Lateral Access-Doors
TASK 54-57-22-400-815-A	Installation of the Rear Mount Fairing (RMF) Door
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 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
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
Rear Mount Fairing (RMF) Assembly
Clearence Check

3. Job Set-up
Subtask 54-57-22-941-087-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) is 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 54-57-22-040-077-A

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make sure that the thrust reverser is unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 54-57-22-010-088-A

C. 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 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.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 410
(b) For the right pylon, in zone 420.

Subtask 54-57-22-110-052-A

D. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) If they are not sufficiently clean, clean the parts retained from the removed component with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Do an inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 54-57-22-420-077-A

A. Installation of the Rear Mount Fairing (RMF) Assembly

Rear Mount Fairing (RMF) Assembly

CAUTION: MAKE SURE THAT YOU INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION. THE SCREWS HAVE DIFFERENT LENGTHS. IF YOU DO NOT INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION, YOU CAN CAUSE DAMAGE.

(1) Installation of the RMF assembly (left side):
(a) Put and hold the RMF assembly (3) in position.
(b) Install the screws (5).
(c) Install the screws (2) and (4) and the nuts (1).
(d) Tighten the nuts (1) and the screws (5).
(2) Installation of the RMF assembly (right side):
(a) Put and hold the RMF assembly (7) in position.
(b) Install the screws (8).
(c) Install the screws (9) and (10) and the nuts (6).
(d) Tighten the nuts (6) and the screws (8).

Subtask 54-57-22-820-057-A

B. Clearance Check

Clearence Check

(1) Make sure that the out-of-flush dimension J2 between the FSS-RMF junction angle (1) and the RMF assembly (2) is 0 +0.3 mm or -0.9 mm (0.0000 +0.0118 in. or -0.0354 in.).

5. Close-up
Subtask 54-57-22-410-071-A

A. Close Access
(1) Install the Rear Mount Fairing (RMF) doors (Ref. AMM TASK 54-57-22-400-815):
(a) For the left pylon: 473AL 473AR
(b) For the right pylon: 483AL 483AR.
(2) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-803):
(a) For the left pylon: 415BL 415BR
(b) For the right pylon: 425BL 425BR.
(3) 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.
(4) 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.

Subtask 54-57-22-440-064-A

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 54-57-22-942-062-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 07:59:59 UTC