1EFF : 301-399, 1 28-11-42Page 420 1 1 May 01/04 1 1 1CES 1R C. Referenced Information

R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R  12-11-28-650-003 
R  28-10-00-910-001 
R  28-10-00-910-002 
R  28-12-47-000-001 
R  28-25-00-650-001 
R  28-25-00-650-003 
R 
R  28-25-00-869-001 
R  57-27-11-000-002 
R 
R 
R 
R  57-27-11-400-002 
R 
R 
R 
R  28-11-42-991-002 
R  FOR FIN 216QM, 217QM 
R  28-10-00-910-001 
R  28-12-47-400-001 
R  3. Job Set-up__________ 
R  Subtask 28-11-42-941-054 
R  A. Safety Precautions 

Pressure Refuel with Automatic Control Safety Procedures When You Do Work in a Fuel Tank Access to the Fuel Tanks and the Work Areas Removal of the NACA Vent Intake Pressure Defuel To Drain Remaining Fuel from the Wing Tanks and the Center Tank Fuel Transfer Removal of the Access Panel (540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB, 640HB, 640JB, 640KB, ....) Installation of the Access Panel (540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB, 640HB, 640JB, ....) Fig. 402
Safety Procedures When You Do Work in a Fuel Tank Installation of the NACA Vent Intake

R WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
R (1) You must obey the fuel saftey procedures (Ref. TASK 28-10-00-910-001)
R when you do work in a fuel tank.
R (2) Make sure that the safety barriers are in position.

 1EFF : 301-399, 1 28-11-42Page 421 1 1 May 01/04 1 1 1CES 1 1EFF : 301-399, 1 28-11-42Page 422 1 1 May 01/04 1 1 1CES 1 1EFF : 301-399, 1 28-11-42Page 423 1 1 May 01/04 1 1 1CES 1 1EFF : 301-399, 1 28-11-42Page 424 1 1 May 01/04 1 1 1CES 1

R  Subtask 28-11-42-860-051 
R  B. Aircraft Maintenance Configuration 
R  (1) Make sure that the applicable fuel tank is defuelled (Ref. TASK 28-
R  25-00-650-001). 
R  (2) Make sure that the remaining fuel has been drained from the 
R  applicable fuel tank (Ref. TASK 28-25-00-650-003). 
R  (3) Make sure the the access platform is below the applicable access 
R  panel 540RB(640RB). 
R  (4) Make sure that the applicable access panels are removed: 
R  - 540RB(640RB) (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-
R  002) 
R  - 550AB(650AB) (Ref. TASK 28-10-00-910-002), (Ref. TASK 28-12-47-000-
R  001). 
R  4. Procedure_________ 
R  (Ref. Fig. 402/TASK 28-11-42-991-002) 
R  Subtask 28-11-42-420-054 
R  A. Preparation for Installation 
R  (1) Clean the component interface and/or the adjacent area with a 
R  MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS 
R  (Material No. 11-026). 
R  (2) Make sure that the parts retained from the removed component are 
R  clean and in the correct condition. 
R  (3) Do an inspection of the component interface and/or the adjacent area.

R  Subtask 28-11-42-420-052 
R  B. Installation of the Clack Valve 
R  WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL_______ 
R  MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. 
R  OBEY THE MANUFACTURERS INSTRUCTIONS. 
R  PUT ON PROTECTIVE CLOTHING. 
R  DO NOT GET THEM IN YOUR MOUTH. 
R  DO NOT SMOKE. 
R  DO NOT BREATHE THE GAS. 
R  THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. 
R  GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED. 
R  (1) Apply a thin layer of SEALANTS (Material No. 09-017) below the heads 
R  and around the shanks of the bolts (1). 
R  NOTE : Make sure that no sealant touches the interface of the clack____ 
R  valve (2) and the rib. 
R  (2) Install the clack valve (2) with the bolts (1). Tighten the bolts 
R  (1). 
R  (3) Apply SEALANTS (Material No. 09-017) to the two ends of the bolts 
R  (1). 
　
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