Removal of the Access Panel

TASK 57-27-11-000-005-A
Removal of the Access Panel

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	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 57-41-37-000-004-A	Removal of the Pressure Relief Panels
Access Panel 521AZ (621AZ), 521BZ (621BZ), 521CZ (621CZ) ** ON A/C NOT FOR ALL
Access Panel 521AZ (621AZ), 521BZ (621BZ), 521CZ (621CZ) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 57-27-11-941-058-A

A. Safety Precautions

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.

(1) You must obey the fuel safety procedures when you do work in a fuel tank, (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Install the 98D27803500001 LOCKING TOOL ZERO POS on the flap/slat control lever.
(4) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate the flaps or slats.

Subtask 57-27-11-650-071-A ** ON A/C NOT FOR ALL

B. Fuel Configuration
(1) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the applicable fuel tank(s) (Ref. AMM TASK 28-25-00-650-003).

Subtask 57-27-11-010-056-A

C. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE below the applicable wing leading-edge, zone 521(621).
(2) Remove the applicable leading-edge pressure-relief panel 521EB(621EB) (Ref. AMM TASK 57-41-37-000-004).

4. Procedure
Subtask 57-27-11-020-054-A ** ON A/C NOT FOR ALL

A. Removal of the Access Panel
(1) Remove the bolts (3) and the access panel (1).
(2) Remove the access panel assembly (2).
(3) Identify the access panel (1) and the access panel assembly (2) with labels.

Subtask 57-27-11-020-054-B ** ON A/C NOT FOR ALL

A. Removal of the Access Panel
(1) Remove the bolts (4) and the access panel (3).
(2) Remove the access panel assembly (1).
(3) Identify the access panel (3) and the access panel assembly (1) with labels.
(4) Remove and discard the seal (2).

[Rev.10 from 2021] 2026.04.01 03:54:16 UTC