Detailed Inspection of RMF Finger Seals, Block, Karman Fairing and Nose Fire Seals

TASK 54-50-00-220-806-A
Detailed Inspection of RMF Finger Seals, Block, Karman Fairing and Nose Fire Seals

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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: 410
ZONE: 420
ZONE: 470
ZONE: 480
FIN: 4020KM1
FIN: 4020KM2

1. Reason for the Job
Refer to the MPD TASK: 545900-L2
DETAILED INSPECTION OF RMF FINGER SEALS, BLOCK, KARMAN FAIRING AND NOSE FIRE SEALS.
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
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON
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 54-53-11-300-802-A	Replacement of the Fire Seals of the Pylon-to-Wing Center Fillets
TASK 54-54-11-300-802-A	Replacement of the Fire Seals of the Rear Pylon Fairing (RPF)
TASK 54-57-22-000-817-A	Removal of the Rear Mount Fairing (RMF) Block Fire-Seal
TASK 54-57-22-300-802-A	Replacement of the Rear Mount Fairing (RMF) Finger-seals
TASK 54-57-22-400-817-A	Installation of the Rear Mount Fairing (RMF) Block Fire-Seal
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
RMF Finger Seals, RMF Block Fire-Seals, Karman Fairing Fire-Seals and Nose Fire Seals

3. Job Set-up
Subtask 54-50-00-941-077-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 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 54-50-00-040-069-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 the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 54-50-00-010-067-A

C. 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) 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.
(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zones 415 and 470
(b) For the right pylon, in zones 425 and 480.

Subtask 54-50-00-110-057-A

D. Preparation of the Inspection Area
(1) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(2) If it is not sufficiently clean, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 54-50-00-220-058-A

A. Inspection

RMF Finger Seals, RMF Block Fire-Seals, Karman Fairing Fire-Seals and Nose Fire Seals

(1) Do a detailed inspection of the RMF block fire-seals (1), RMF finger seals (2) and nose fire seals (4). Do this inspection on the left and right sides.
(a) Make sure that there is no damage or degradation (cracks on elastomeric slide) on the RMF block fire-seals (1):

If you find damage and/or degradation (cracks on elastomeric slide), replace the applicable RMF block fire-seals (1) (Ref. AMM TASK 54-57-22-000-817) and (Ref. AMM TASK 54-57-22-400-817).

(b) Make sure that there is no damage or degradation on the RMF finger seals (2):

If you find damage and/or degradation, replace the applicable RMF finger seals (2) (Ref. AMM TASK 54-57-22-300-802).

(c) Make sure that there is no damage or degradation on the nose fire seals (4).
(2) Do a detailed inspection of the karman fairing fire-seals (3).
(a) Make sure that there is no damage or degradation on the karman fairing fire-seals (3).

If you find damage and/or degradation, replace the applicable karman fairing fire-seals (3):

1 For the fire seals of the pylon-to-wing center fillets (Ref. AMM TASK 54-53-11-300-802).
2 For the fire seals of the Rear Pylon Fairing (RPF) (Ref. AMM TASK 54-54-11-300-802).

5. Close-up
Subtask 54-50-00-410-069-A

A. Close Access
(1) 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.
(2) 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 54-50-00-440-065-A

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

Subtask 54-50-00-942-060-A

C. Aircraft Maintenance Configuration
(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 01:59:16 UTC