B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-11-28-650-003 Pressure Refuel with Automatic Control 28-10-00-910-001 Safety Procedures When You Do Work in a Fuel Tank 28-10-00-910-002 Access to the Fuel Tanks and the Work Areas 28-25-00-650-001 Pressure Defuel 28-25-00-650-003 To Drain Remaining Fuel from the Wing Tanks and the
Center Tank 28-25-00-869-001 Fuel Transfer 57-27-11-000-002 Removal of the Access Panel (540HB, 540JB, 540KB,
540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB, 640HB, 640JB, 640KB, ....)
57-27-11-400-002 Installation of the Access Panel (540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB, 640HB, 640JB, ....)
28-12-44-991-001 Fig. 401
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3. Job Set-up
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(Ref. Fig. 401/TASK 28-12-44-991-001) Subtask 28-12-44-941-066
A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
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(1) You must obey the fuel safety procedures (Ref. TASK 28-10-00-910-001) when you do work in a fuel tank.
(2) Make sure that the safety barriers are in position. Subtask 28-12-44-860-050
B. Aircraft Maintenance Configuration
(1)
Make sure that the applicable fuel tank is defueled (Ref. TASK 28-25-00-650-001) .
(2)
Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. TASK 28-25-00-650-003).
(3)
Make sure that the access platform is below the applicable access panel 540JB(640JB).
(4)
Make sure that the applicable access panel is removed 540JB(640JB) (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-002).
4. Procedure
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(Ref. Fig. 401/TASK 28-12-44-991-001) Subtask 28-12-44-420-051
A. Installation of the Check Valve 52QM(53QM)
(1)
Hold the clamp (2) on the end of the pipe (1) and install the check-valve (3), with the flat face horizontal.
(2)
Move the clamp (2) on to the check-valve (3) and tighten the clamp (2).
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5. Close-up
________ Subtask 28-12-44-410-051
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the applicable access panel 540JB(640JB) (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-400-002).
Subtask 28-12-44-650-058
B. Fuel Configuration
(1) Refuel Defuel or transfer fuel as necessary (Ref. TASK 12-11-28-650-003), (Ref. TASK 28-25-00-650-001) or (Ref. TASK 28-25-00-869-001).
Subtask 28-12-44-942-053
C. Removal of Equipment
(1)
Remove the safety barriers.
(2)
Remove the warning notice(s).
(3)
Remove the access platform(s).
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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TASK 28-12-44-000-002
Removal of the Check Valve 50QM (51QM)
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
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START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
1. Reason for the Job
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