Installation of the Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ)

TASK 57-27-12-400-001-A
Installation of the Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ)

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: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

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

ZONE: 540
ZONE: 640

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05EML9)	Epoxy Adhesive-- - Legacy 1
(Material No.05JBB9)	Contact Adhesive-Rubber & Plastic Bonding Nitrile base -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion 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
540	FUEL TANK
640	FUEL TANK
540AB, 640AB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
23	SEAL	AIPC 57-27-12-01-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
Seal of the Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ) ** ON A/C NOT FOR ALL
Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ)
Seal of the Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 57-27-12-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you obeyed the fuel safety procedures when you do work in the fuel tank (Ref. AMM TASK 28-10-00-910-001).
(2) Make sure that the safety barriers are in position.
(3) Make sure that the 98D27803500001 LOCKING TOOL ZERO POS is correctly installed on the slats and flaps control lever.
(4) Make sure that the WARNING NOTICE(S) (is) are in position in the cockpit, on the center pedestal, to tell persons not to operate the slats and flaps control lever.

Subtask 57-27-12-860-051-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the wing fuel tank, at zone 540(640).
(2) Make sure that the access panel is removed (Ref. AMM TASK 57-27-11-000-001):

For the left wing: 540AB
For the right wing: 640AB.

Subtask 57-27-12-860-051-B

DELETED

4. Procedure
Subtask 57-27-12-560-050-A ** ON A/C NOT FOR ALL

A. Preparation of a Replacement Component
(1) Clean the interfaces of the hinges (18) and the surge door (17) with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) :

On the interfaces of the hinges (18) and the surge door (17)
Below the heads and on the plain part of the bolts (15).

(3) Install the hinges (18), the bolts (15) and the nuts (19) on the surge door (17).
(4) Tighten the nuts (19).
(5) Clean the surfaces that follow with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) :

The heads of the bolts (15) and the area around them
The nuts (19) and the threaded ends of the bolts (15).

(6) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on:

The heads of the bolts (15)
The nuts (19) and the threaded ends of the bolts (15).

Subtask 57-27-12-420-051-A ** ON A/C NOT FOR ALL

B. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the seal (23) is in good condition.
(5) If the seal (23) is not in good condition, replace it as follows:
(a) Remove the seal (23) with the SCRAPER - NON METALLIC.
(b) Clean the area with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(c) Apply the Contact Adhesive-Rubber & Plastic Bonding Nitrile base - (Material No.05JBB9) on the mating surfaces of the seal (23) and the surge door (17).
(d) Install the new AIPC 57-27-12-01-010 SEAL (23).
1 Make sure that the textured side of the seal (23) is on the flat side of the surge door (17).

Subtask 57-27-12-420-051-B ** ON A/C NOT FOR ALL

B. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the seal (23) is in good condition.
(5) If the seal (23) is not in good condition, replace it as follows:
(a) Remove the seal (23) with the SCRAPER - NON METALLIC.
(b) Clean the area with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(c) Apply the Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) on the mating surfaces of the seal (23) and the surge door (17).
(d) Install the new AIPC 57-27-12-01-010 SEAL (23).
1 Make sure that the seal (23) is on the flat side of the surge door (17).

Subtask 57-27-12-420-051-C

DELETED

Subtask 57-27-12-420-050-A ** ON A/C NOT FOR ALL

C. Installation of the Rib 2 Surge Door 540AZ(640AZ) or 540BZ(640BZ)
(1) If you removed the springs (11) from the brackets (12), install them as follows:
(a) Install the sleeves (16), the springs (11), the bobbins (20), the washers (21), the bolts (22), the washers (14) and the nuts (13).
(b) Tighten the nuts (13).
(2) Install the surge door (17) as follows:
(a) Put the surge door (17) in position on the brackets (3).
(b) Install the washers (2), the pins (4) and the nuts (1) on the brackets (3).
(c) Tighten the nuts (1).
(d) Make sure that the surge door (17) moves freely on the pins (4) before the installation of the springs (11).

WARNING: BE CAREFUL WHEN YOU REMOVE OR INSTALL THE SPRING. THE TENSION IN THE SPRING CAN CAUSE INJURY TO PERSONS.

(e) Install the springs (11) on the hinges (18) as follows:
1 Install the sleeves (8), the springs (11), the bobbins (7), the washers (6), the bolts (5), the washers (9) and the nuts (10).
2 Tighten the nuts (10).

Subtask 57-27-12-420-050-B

DELETED

5. Close-up
Subtask 57-27-12-410-050-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) Install the access panel (Ref. AMM TASK 57-27-11-400-001):

For the left wing: 540AB
For the right wing: 640AB.

Subtask 57-27-12-410-050-B

DELETED

Subtask 57-27-12-650-051-A

DELETED

Subtask 57-27-12-941-053-A ** ON A/C NOT FOR ALL

C. Removal of Equipment
(1) Remove the SAFETY BARRIERS.
(2) Remove the access platform(s).
(3) Remove the 98D27803500001 LOCKING TOOL ZERO POS from the slats and flaps control lever.
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:30:53 UTC