Installation of the Joint Plate and the Nose Fire Seal

TASK 54-57-22-400-821-A
Installation of the Joint Plate and the Nose Fire Seal

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
FIN: 4020KM1 ** ON A/C NOT FOR ALL
FIN: 4020KM2 ** ON A/C NOT FOR ALL

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	Torque wrench: range to between 1.7 and 1.3 m.N (15.04 and 11.50 lbf.in )
No specific	Torque wrench: range to between 4.7 and 3.7 m.N (41.59 and 32.74 lbf.in )

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
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	SEAL	AIPC 54-57-82-23-140

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 72-21-04-400-801-A	Installation of the Fan Exit Fairing - Upper Bifi
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Joint Plate and Nose Fire Seal

3. Job Set-up
Subtask 54-57-22-941-103-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 54-57-22-040-093-A ** ON A/C NOT FOR ALL

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 78-30-00-040-805).

Subtask 54-57-22-010-092-A ** ON A/C NOT FOR ALL

C. Get access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
(2) Make sure that the thrust-reverser cowl doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, at zone 410
(b) For the right pylon, at zone 420.
(4) Install the fan exit fairing - upper Bifi (Ref. AMM TASK 72-21-04-400-801).

Subtask 54-57-22-110-066-A ** ON A/C NOT FOR ALL

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 kept from the removed component with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Do an inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 54-57-22-420-083-A ** ON A/C NOT FOR ALL

A. Installation of the Joint Plate and the Nose Fire Seal

Joint Plate and Nose Fire Seal ** ON A/C NOT FOR ALL

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) Assemble the nose fire seal (1) and the joint plate (2) together before the installation:
(a) Make sure that the nose fire seal (1) is in the correct condition. If it is not, discard it and install the new nose fire AIPC 54-57-82-23-140 SEAL (1).
(b) Assemble the nose fire seal (1) and the joint plate (2) together on the pylon box:
1 Put and hold the nose fire seal (1) in position on the joint plate (2).
2 Install the nut (7).
3 TORQUE the nut (7) to between 1.7 and 1.3 m.N (15.04 and 11.50 lbf.in )

.
(c) Install the nose fire seal (1) and the joint plate (2) on the pylon box:
1 Slide the assembly from the upper side of the pylon-to-engine forward fitting.
2 If necessary, carefully bend the joint plates (2) out to engage the seal fastener threads in the oblong holes.

NOTE: Two operators are necessary for this procedure, one on each side of the pylon box.

3 Make sure that the seal is correctly installed on the pylon-to-engine forward fitting and the fan exit fairing - upper Bifi.
4 Make sure that there is no deformation or clearance between the lower part of the nose fire seal (1) and the fan exit fairing - upper Bifi.

NOTE: A deformation or clearance is permitted between the upper part of the nose fire seal (1) and the fan exit fairing - upper Bifi only if there is no deformation or clearance on the lower part of the nose fire seal (1).

5 If you find clearance or deformation on the lower part of the nose fire seal (1):

Remove the nose fire seal (1) and the joint plate (2).
Do step (2) again.

6 Install the bolts (3) and (6) and tighten them.
7 Install the washers (4) and the nuts (5).
8 TORQUE the nuts (5) to between 1.7 and 1.3 m.N (15.04 and 11.50 lbf.in )

Subtask 54-57-22-420-083-B ** ON A/C NOT FOR ALL

A. Installation of the Joint Plate and the Nose Fire Seal

Joint Plate and Nose Fire Seal ** ON A/C NOT FOR ALL

(1) Assemble the nose fire seal (1) and the joint plate (2) together before the installation:
(a) Make sure that nose fire seal (1) is in the correct condition. If it is not, discard it and install the new nose fire AIPC 54-57-82-23-140 SEAL (1).
(b) Assemble the nose fire seal (1) and the joint plate (2) together on the pylon box:
1 Put and hold the nose fire seal (1) in position on the joint plate (2).
2 Install the nut (7).
3 TORQUE the nut (7) to between 4.7 and 3.7 m.N (41.59 and 32.74 lbf.in )

NOTE: Two operators are necessary for this procedure, one on each side of the pylon box.

5 If you find clearance or deformation on the lower part of the nose fire seal (1):

Remove the nose fire seal (1) and the joint plate (2).
Do step (2) again.

6 Install the bolts (3) and (6) and tighten them.
7 Install the washers (4) and the nuts (5).
8 TORQUE the nuts (5) to between 4.7 and 3.7 m.N (41.59 and 32.74 lbf.in )

5. Close-up
Subtask 54-57-22-410-082-A ** ON A/C NOT FOR ALL

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 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(3) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.

Subtask 54-57-22-440-074-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 54-57-22-942-071-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:49:34 UTC