Removal of the Panel Assembly

TASK 28-12-45-000-001-A
Removal of the Panel Assembly

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: 550
ZONE: 650

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)
No specific	AR	SAFETY BARRIER(S)
98A53003500000	1	REMOVAL TOOL OF PHILLIPS TORQUE
98A57304002000	1	EXTRACTION, MANHOLE BOLT

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
550	VENT SURGE TANK
650	VENT SURGE TANK
550CB, 650CB

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 28-12-41-000-001-A	Removal of the Overpressure Protector
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
Panel Assembly 550CB (650CB) ** ON A/C NOT FOR ALL
Panel Assembly 550CB (650CB) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-12-45-941-054-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 (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002) .
(2) Put the SAFETY BARRIER(S) in position.

Subtask 28-12-45-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Drain the fuel from the applicable vent surge tank (Ref. AMM TASK 28-25-00-650-003).
(2) Put the ACCESS PLATFORM 4M (13 FT) below the applicable access panel:

for the left wing, below 550CB
for the right wing, below 650CB.

Subtask 28-12-45-860-052-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Drain the fuel from the applicable vent surge tank (Ref. AMM TASK 28-25-00-650-003).

CAUTION: WHEN YOU PUT THE ACCESS PLATFORM IN POSITION, BE CAREFUL NOT TO CAUSE DAMAGE TO THE VORTEX GENERATOR.

(2) Put the ACCESS PLATFORM 4M (13 FT) below the applicable access panel:
(a) For the left wing:

550CB.

(b) For the right wing:

650CB.

4. Procedure
Subtask 28-12-45-020-050-A

CAUTION: YOU MUST REMOVE AND INSTALL THE BOLTS IN THE SPECIFIED SEQUENCE. THIS WILL PREVENT DAMAGE TO THE ACCESS PANEL.

A. Removal of the Panel Assembly 550CB(650CB)

NOTE: If you cannot remove the bolts (4) easily, use the 98A53003500000 REMOVAL TOOL OF PHILLIPS TORQUE or the 98A57304002000 EXTRACTION, MANHOLE BOLT.

(1) Remove the bolts (4) in the sequence X thru A.
(2) Remove the access panel (3) together with the overpressure protector (1).
(3) Put a protective cover around the overpressure protector (1).

NOTE: Removal of the overpressure protector 46QM (47QM) is given in the (Ref. AMM TASK 28-12-41-000-001).

[Rev.10 from 2021] 2026.04.02 07:01:33 UTC