Re-activation of the Overpressure Protector - FAA Operators Only

TASK 28-12-00-440-802-A
Re-activation of the Overpressure Protector - FAA Operators Only

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.

FIN: 46QM
FIN: 47QM

1. Reason for the Job

NOTE: This procedure is for FAA operators only and is the re-activation procedure for the TASK 28-12-00-040-802.

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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
550CB, 650CB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-12-00-200-001-A	Inspection of the Tank Venting System
TASK 28-12-45-000-001-A	Removal of the Panel Assembly
TASK 28-12-45-400-002-A	Installation of the Panel Assembly
Overpressure Protector 46QM (47QM) - Location and Detail

3. Job Set-up
Subtask 28-12-00-941-065-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) In the cockpit, put a WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
(3) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the applicable access panel 550CB ( 650CB).

4. Procedure
Subtask 28-12-00-440-052-A

A. Re-activation of the Overpressure Protector 46QM (47QM)
(1) Replace the applicable overpressure protector (Ref. AMM TASK 28-12-45-000-001) and (Ref. AMM TASK 28-12-45-400-002).
(2) Do an inspection of the tank venting system to find the cause of the overpressure protector operation (Ref. AMM TASK 28-12-00-200-001).
(3) Make an entry in the aircraft technical log that the overpressure protector is re-activated.

5. Close-up
Subtask 28-12-00-942-068-A

A. Removal of the Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(5) Remove the SAFETY BARRIERS.

[Rev.10 from 2021] 2026.04.02 06:17:08 UTC