(Ref. Fig. 401A/TASK 28-12-44-991-001-A)
**ON A/C ALL
Subtask 28-12-44-941-068
A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
(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.
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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 540AB(640AB).
(4)
Make sure that the applicable access panel is removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-001):
-
FOR 120QM
540AB
-
FOR 121QM
640AB.
(5)
Make sure that the applicable surge door 540BZ(640BZ) is open and that the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000) is installed.
4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 401/TASK 28-12-44-991-001)
**ON A/C 301-399,
(Ref. Fig. 401A/TASK 28-12-44-991-001-A)
**ON A/C ALL
Subtask 28-12-44-420-053
A. Installation of the Check Valve 120QM(121QM)
(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 28-12-44-410-053
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the HOOK-COVER (RIB2-SURGE DOORS) and carefully close the surge door 540BZ(650BZ).
(3)
Install the applicable access panel 540AB(640AB) (Ref. TASK 57-27-11-400-001).
Subtask 28-12-44-650-061
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 28-12-44-942-057
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 28-12-44-000-004
Removal of the Check Valve 93QM
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.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific safety barriers No specific warning notice No specific access platform 2.8 m (9 ft. 2 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 32-12-00-010-001 Open the Main Gear Doors for Access 57-17-11-000-001 Removal of the Covers 147AZ (148AZ)
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