Installation of the Pylon Fairing Bracket

TASK 57-26-16-400-001-A
Installation of the Pylon Fairing Bracket

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

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.

ZONE: 573
ZONE: 673

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)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
573	FIXED STRUCT FROM STA 1800 TO STA 4666
673	FIXED STRUCT FROM STA 1800 TO STA 4666
573CB, 573DB, 673CB, 673DB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 54-54-00-000-001-A	Removal of the Aft Fixed Fairing
TASK 54-54-00-000-001-A-01	Removal of the Aft Fixed Fairing
TASK 54-54-00-400-001-A	Installation of the Aft Fixed Fairing
TASK 54-54-00-400-001-A-01	Installation of the Aft Fixed Fairing
TASK 57-51-37-000-002-A	Removal of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-400-002-A	Installation of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
Pylon Fairing Bracket

3. Job Set-up
Subtask 57-26-16-941-051-A

A. Safety Precautions
(1) Make sure that the safety barriers are in position.
(2) Make sure the WARNING NOTICE(S) are in position in the cockpit to tell persons not to start the engine 1 (2).
(3) Make sure the WARNING NOTICE(S) is in position on the hydraulic ground connector to tell persons not to connect it.

Subtask 57-26-16-860-050-A

B. Aircraft Maintenance Configuration
(1) Make sure the ACCESS PLATFORM 3M (10 FT) is in position below the applicable engine pylon, zone 470 (480).
(2) Make sure the applicable fixed pylon fairing has been removed (Ref. AMM TASK 54-54-00-000-001).
(3) Make sure the applicable access panels are removed:
(a) For the left wing:

(b) For the right wing:

4. Procedure
Subtask 57-26-16-560-050-A

A. Preparation of a Replacement Component
(1) Use the bracket assembly (4) that you removed as a template to drill 6.35 mm (0.25 in.) holes in the new bracket assembly. Discard the used bracket assembly (4).

NOTE: The new bracket assembly (4) has 4.76 mm (0.20 in.) pilot holes.

Subtask 57-26-16-420-051-A

B. Preparation for Installation
(1) Use a Textile-Lint free Cotton - (Material No.14SBA1) , made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating surfaces of the bracket assembly (4) and the reinforcing plate.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the interface surfaces of the bracket assembly (4) and the reinforcing plate.

Subtask 57-26-16-420-050-A

C. Installation of the Pylon Fairing Bracket
(1) Install the bracket assembly (4) on the reinforcing plate with the bush and bearing on the centerline of the pylon.
(2) Install the bolts (1), the washers (3) and the nuts (2).
(3) Remove the unwanted sealant with Non Aqueous Cleaner-General - - (Material No.08BAA9) .

5. Close-up
Subtask 57-26-16-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels:
(a) For the left wing:

(b) For the right wing:

(3) Install the applicable fixed pylon fairing (Ref. AMM TASK 54-54-00-400-001).

Subtask 57-26-16-942-050-A

B. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
(2) Remove the safety barriers.
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 02:11:45 UTC