Subtask 28-25-42-010-050-A
 D. Get Access
 (1)
 Put the access platform in position below the applicable zone 540 (640).

 (2)
 Remove the applicable access panel 540HB, 640HB (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-002).

 **ON A/C ALL
 4. Procedure
_________
 **ON A/C 001-001, 051-052,

 (Ref. Fig. 401/TASK 28-25-42-991-001)
 1EFF : ALL 1 28-25-42Page 408 1 1 Aug 01/05 1 1 1CES 1 **ON A/C 002-049, 053-061, 101-103, 201-203,

 (Ref. Fig. 401A/TASK 28-25-42-991-001-A)
 **ON A/C 301-399,

 (Ref. Fig. 401B/TASK 28-25-42-991-001-C) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499, Post SB 28-1077 For A/C 001-049,051-061,101-103,201-203, (Ref. Fig. 401C/TASK 28-25-42-991-001-B) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 28-25-42-020-050
 A. Removal of the Refuel Diffuser Assembly - Wing Tanks
 (1)
 Remove the nut (3), the screw (1) and disconnect the bonding strip (2).

 (2)
 Remove the bolts (4) and (7), the washers (6) and then the diffuser

 (8) from the connector.
 (3) Remove and discard the O-ring (5).
 **ON A/C 301-399,

 Subtask 28-25-42-020-050-A
 A. Removal of the Refuel Diffuser Assembly - Wing Tanks
 (1)
 Remove the nut (7) and the bolt (1). Disconnect the bonding strap (8) from the diffuser (2).

 (2)
 Remove the bolts (5) and the bolts (6). Remove the diffuser (2) from the pipe (4).

 (3)
 Remove and discard the O-ring (3).

 1EFF : ALL 1 28-25-42Page 409 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 TASK 28-25-42-400-001
 Installation of the Refuel Diffuser Assembly - Wing Tanks
 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
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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. 09-001 USA MIL-S-8802 TYPE I CLASS A
 FUEL TANK SEALANTPOLYSULFIDE (Ref. 20-31-00) Material No. 11-026 GB DEF-STAN 68-148/1
 SOLVENT GENERAL PURPOSE (Ref. 20-31-00) Material No. 19-003 USA AMS 3819
 LINT-FREE COTTON CLOTH (Ref. 20-31-00)
 1EFF : ALL 1 28-25-42Page 410 1 1 May 01/05R 1 1 1CES 1

 C. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION  |IPC-CSN
 -------------------------------------------------------------------------------
3 O-ring 28-25-05 28A-120 5 O-ring 28-25-05 28A-120
 D. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
12-11-28-650-003 Pressure Refuel with Automatic Control 20-28-00-912-002 Electrical Bonding of Components With Conductive
 Bolts and Screws in the Tanks 20-28-00-912-006 Electrical Bonding of Pipes 28-00-00-000-001 Removal of the Fuel Pipes 28-00-00-400-001 Installation of the Fuel Pipes 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 28-25-42-991-001 Refuel Diffuser Assembly - Wing Tanks 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, ....)
　
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