(3)
 Put the access platform below the applicable zone 540(640).

 4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 401/TASK 28-12-46-991-002)
 **ON A/C 301-399,

 (Ref. Fig. 401A/TASK 28-12-46-991-002-A)
 1EFF : ALL 1 28-12-46Page 402 1 1 Aug 01/05 1 1 1CES 1

 Inner Cell Overpressure-Protector Outlet, 540HB(640HB)
 Figure 401/TASK 28-12-46-991-002

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 28-12-46Page 403 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1

R Wing Tank Overpressure-Protector Outlet, 540PB(640PB) Figure 401A/TASK 28-12-46-991-002-A
R 1EFF : 301-399, 1 28-12-46Page 404 1 1 Feb 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,

 Subtask 28-12-46-020-051
 A. Removal of the Overpressure-Protector Outlet CAUTION : YOU MUST REMOVE AND INSTALL THE BOLTS IN THE SPECIFIED
_______
 SEQUENCE. THIS WILL PREVENT DAMAGE TO THE ACCESS PANEL.
 (1)
 Remove the bolts (4) in the sequence AB thru A.

 (2)
 Remove the access panel 540HB (640HB). NOTE : For instructions to overhaul the overpressure-protector outlet

____ assembly (Ref. CMM 281246).
 (3) Put a protective cover around the pressure relief outlet (1).
 **ON A/C 301-399,

 Subtask 28-12-46-020-051-A
 A. Removal Of the Overpressure-Protector Outlet CAUTION : YOU MUST REMOVE AND INSTALL THE BOLTS IN THE SPECIFIED
_______
 SEQUENCE. THIS WILL PREVENT DAMAGE TO THE ACCESS PANEL.
 (1)
 Remove the bolts (4) in the sequence AF thru A.

 (2)
 Remove the access panel 540PB (640PB). NOTE : For instructions to overhaul the overpressure-protector outlet

____ assembly (Ref. CMM 281246).
 (3) Put a protective cover around the pressure relief outlet (1).
 1EFF : ALL 1 28-12-46Page 405 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 TASK 28-12-46-400-001 Installation of the Overpressure-Protector Outlet 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 non-metalic scraper No specific safety barriers No specific access platform 3.5 m (11 ft. 6 in.) No specific Torque Wrench : range 5.00 to 35.00 lbf.in
 (0.05 to 0.40 m.daN) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
 (0.40 to 2.60 m.daN)
 1EFF : ALL 1 28-12-46Page 406 1 1 Aug 01/05R 1 1 1CES 1

 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R Material No. 05-002 USA MIL-P-8116 R PUTTY, ZINC CHROMATE GENERAL PURPOSE (Ref. 20-31-00) Material No. 09-007 USA MIL-S-4383 BRUSHABLE FUEL RESISTANT COATING (Ref. 20-31-00)
 Material No. 11-004  USA MIL-T-81533
 1.1.1TRICHLOROETHANE (METHYL CHLOROFORM)
 (Ref. 20-31-00)

 Material No. 11-026 GB DEF-STAN 68-148/1
 SOLVENT GENERAL PURPOSE (Ref. 20-31-00)
 Material No. 15-004 USA MIL-C-16173 GRADE 3
 CORROSION PREVENTIVE COMPOUND (Ref. 20-31-00)
 Material No. 19-003 USA AMS 3819
 LINT-FREE COTTON CLOTH (Ref. 20-31-00)

 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
sealing ring  28-12-46 01A-010
 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
 20-28-00-912-004  Electrical Bonding of Components With Conductive Bolts and Screws and Bonding Straps in the Fuselage and in the Wings (this does not include the tanks)-
28-00-00-910-001 Fuel Safety Procedures
　
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