Installation of the Access Panel

TASK 57-41-37-400-009-A
Installation of the Access Panel

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: 521
ZONE: 621

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 4M (13 FT)-ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC1)	Polysulfide Sealant-General Purpose Interfay -
(Material No.06ABB2)	Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14DBB1)	Release Agent-- Liquid Wax -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
521	INBOARD FIXED L.E STRUCTURE
621	INBOARD FIXED L.E STRUCTURE

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-21-11-911-001-A	Tightening Torques for Standard Threaded Fasteners
TASK 27-80-00-866-004-A	Extending the Slats on the Ground
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
Access Panel 521BT(621BT) - Location and Detail

3. Job Set-up
Subtask 57-41-37-941-073-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 57-41-37-860-068-A

B. Aircraft Maintenance Configuration
(1) Make sure that the slats are fully extended (Ref. AMM TASK 27-80-00-866-004).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the flap/slat control lever.
(3) Make sure that the WARNING NOTICE(S) is in position in the cockpit to tell persons not to operate the slats.
(4) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the applicable access panel 521BT(621BT).

Subtask 57-41-37-865-088-A

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

4. Procedure
Subtask 57-41-37-210-063-A

A. Preparation for Installation
(1) Do an inspection of the component interfaces and the adjacent area.
(2) Use the SCRAPER - NON METALLIC and the Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean:

The interface of the aircraft structure
The mating surfaces of the access panel (6).

(3) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) on the interface of the aircraft structure.
(4) Apply Release Agent-- Liquid Wax - (Material No.14DBB1) on the mating surfaces of the access panel (6).
(5) Make sure that the work area is clean and clear of tools and other items.

Subtask 57-41-37-420-063-B ** ON A/C NOT FOR ALL

B. Installation of Access Panel 521BT(621BT)

CAUTION: MAKE SURE THAT THE ACCESS PANEL SCREWS ARE INSTALLED IN THEIR CORRECT POSITIONS. INCORRECT INSTALLATION OF THE SCREWS CAN CAUSE DAMAGE TO THE SLATS DURING SLAT MOVEMENT.

(1) Hold the access panel (6) in position.

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.

(2) Install the screws (1), (2), (3), (4) and (5).
(3) Tighten the screws gradually (Ref. AMM TASK 20-21-11-911-001).
(4) Make sure that the access panel (6) is correctly aligned with the adjacent panels.
(5) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) in the space between the access panel (6) and the adjacent surface.

Subtask 57-41-37-420-063-C ** ON A/C NOT FOR ALL

B. Installation of Access Panel 521BT(621BT)

CAUTION: MAKE SURE THAT THE ACCESS PANEL SCREWS ARE INSTALLED IN THEIR CORRECT POSITIONS. INCORRECT INSTALLATION OF THE SCREWS CAN CAUSE DAMAGE TO THE SLATS DURING SLAT MOVEMENT.

(1) Hold the access panel (6) in position.

(2) Install the screws (1), (2), (3), (4) and (5).
(3) Tighten the screws gradually (Ref. AMM TASK 20-21-11-911-001).
(4) Make sure that the access panel (6) is correctly aligned with the adjacent panels.
(5) Apply Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius (Material No.06ABB2) in the space between the access panel (6) and the adjacent surface.

5. Close-up
Subtask 57-41-37-865-089-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

Subtask 57-41-37-860-069-A

B. Aircraft Maintenance Configuration
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat lever control.
(2) Retract the slats (Ref. AMM TASK 27-80-00-866-005).

Subtask 57-41-37-942-065-A

C. Removal of Equipment
(1) Remove the access platform(s).
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(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 03:53:15 UTC