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
 57-27-11-000-001  Removal of the Access Panel (540AB, 540BB, 540CB, 540DB, 540EB, 540FB, 540GB, 640AB, 640BB, 640CB, 640DB, 640EB, 640FB, 640GB)
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28-25-44-991-001 Fig. 401
 3. Job Set-up
__________
 (Ref. Fig. 401/TASK 28-25-44-991-001) Subtask 28-25-44-941-051
 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) Put the safety barriers in position. Subtask 28-25-44-650-050
 B. Fuel Configuration
 (1)
 Defuel the applicable fuel tank (Ref. TASK 28-25-00-650-001).

 (2)
 Drain the remaining fuel from the applicable fuel tank (Ref. TASK 28-25-00-650-003).

 Subtask 28-25-44-010-050
 C. Get Access
 (1)
 Put the access platform in position below the applicable access panel 540AB, 640AB.

 (2)
 Remove the applicable access panel (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-001):

 -
FOR 31QM
 remove 540AB

 -
FOR 32QM
 remove 640AB.

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 Fuel Drain Valve 31QM(32QM)
 Figure 401/TASK 28-25-44-991-001
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1  1  Feb 01/98
 1  1
 1CES  1

 (3)
 Get access to the fuel drain valve through the applicable rear spring-loaded cover in RIB 2: FOR 31QM

 -
through 540BZ
 FOR 32QM

 -
through 640BZ.

 (4)
 Install the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000) to keep the spring-loaded cover open.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 28-25-44-991-001) Subtask 28-25-44-020-050
 A. Removal of the Fuel Drain Valve
 (1)
 Remove the fuel drain valve (1).

 (2)
 Remove and discard the O-ring (2).

 (3)
 Put blanking plugs on the disconnected line ends.

 1EFF : ALL 1 28-25-44Page 404 1 1 Feb 01/98 1 1 1CES 1 TASK 28-25-44-400-001

 Installation of the Fuel Drain Valve
 WARNING : MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING
_______
 NOTICES ARE IN POSITION.

 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 access platform 3.0 m (9 ft. 10 in.)

 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R Material No. 01-001 USA ASTM-D-1655-93 (JET A-1) FUEL, TURBO (Ref. 20-31-00) Material No. 04-012 USA VV-P-236 PURE MINERALVASELINE OR PETRO- LATUM (Ref. 20-31-00)
 Material No. 11-004  USA MIL-T-81533
 1.1.1TRICHLOROETHANE (METHYL CHLOROFORM)
 (Ref. 20-31-00)

 Material No. 19-003  USA AMS 3819
 LINT-FREE COTTON CLOTH (Ref. 20-31-00)

 1EFF : ALL 1 28-25-44Page 405 1 1 Aug 01/98 1 1 1CES 1 C. Expendable Parts

 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
　
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