TASK 28-11-00-790-008
 Leak Test with Fuel of the Wing Tank
 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 circuit breaker(s) safety clip(s)
 No specific low pressure, dry and filtered air supply
 No specific safety barriers
 No specific soft brush
 No specific warning notice
 No specific access platform 2.5 m (8 ft. 2 in.)
 No specific adjustable access platform 2.9 m (9 ft. 6 in.)
 No specific adjustable access platform 4.2 m (13 ft. 9 in.)
 No specific access platform 4 m (13 ft. 1 in.)
 98D28004080001 2 GAG - CLACK VALVE

 1EFF : 301-399, 1 28-11-00Page 518 1 1 May 01/05R 1 1 1CES 1

 B. Consumable Materials
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
Material No. 19-003 Material No. 19-004 USA AMS 3819 LINT-FREE COTTON CLOTH (Ref. 20-31-00) WHITE TALCUM POWDER (Ref. 20-31-00)
 C. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
R R R R  12-11-28-650-003 27-50-00-866-008 27-50-00-866-009 27-60-00-866-002 28-10-00-910-001 28-10-00-910-002 28-12-47-000-001 28-12-47-400-001 28-25-00-650-001 28-25-00-650-003 28-25-00-869-001 32-12-00-010-001 32-12-00-410-001 57-17-11-000-001 57-17-11-400-001 57-27-11-000-005 57-27-11-400-005 28-11-00-991-008  Pressure Refuel with Automatic ControlExtension of the Flaps on the GroundRetraction of the Flaps on the GroundExtension-Retraction of the Spoilers for MaintenanceSafety Procedures When You Do Work in a Fuel TankAccess to the Fuel Tanks and the Work AreasRemoval of the NACA Vent IntakeInstallation of the NACA Vent IntakePressure DefuelTo Drain Remaining Fuel from the Wing Tanks and the Center TankFuel TransferOpen the Main Gear Doors for AccessClose the Main Gear Doors after AccessRemoval of the Covers 147AZ (148AZ)Installation of the Covers 147AZ (148AZ) Removal of the Access Panel 521AZ(621AZ), 521BZ(621BZ), 521CZ(621CZ) Installation of the Access Panel 521AZ(621AZ), 521BZ(621BZ), 521CZ(621CZ)Fig. 502

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R  3. Job Set-up__________ 
R  Subtask 28-11-00-941-085 
R  A. Safety Precautions 
R  WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK._______ 
R  (1) You must obey the fuel safety procedures when you do work in a fuel 
R  tank (Ref. TASK 28-10-00-910-001). 
R  (2) Put a warning notice in the cockpit to tell persons not to operate 
R  the flight controls. 
R  (3) Put a warning notice in position to tell persons not to operate the 
R  landing gear doors. 
R  (4) Put the safety barriers in position. 
R  Subtask 28-11-00-480-053 
R  B. Install Test Equipment 
R  (Ref. Fig. 502/TASK 28-11-00-991-008) 
R  (1) Drain the remaining fuel from the vent surge tank (Ref. TASK 28-25-
R  00-650-003). 
R  (2) Put the access platform in position below the applicable zone 550 or 
R  650. 
R  (3) Remove the applicable NACA vent intake 550AB(650AB) (Ref. TASK 28-10-
R  00-910-002), (Ref. TASK 28-12-47-000-001). 
R  (4) Install the GAG - CLACK VALVE (98D28004080001) in the clack valves. 
R  Tighten the nut (1) to retain each of the GAG - CLACK VALVE in the 
R  clack valves. 
R  (5) Make sure that the flags (1) hang from the related, open, NACA vent 
R  intake door 550AB(650AB). 

R 1EFF : 301-399, 1 28-11-00Page 520 1 1 May 01/04 1 1 1CES 1

R  Clack Valve Gag - Installation 
　
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