R  12-11-28-650-003  Pressure Refuel with Automatic Control 
R  20-28-00-912-002  Electrical Bonding of Components With Conductive 
R  Bolts and Screws in the Tanks 
R  28-10-00-910-001  Safety Procedures When You Do Work in a Fuel Tank 
R  28-10-00-910-002  Access to the Fuel Tanks and the Work Areas 
R  28-12-47-000-001  Removal of the NACA Vent Intake 
R  28-12-47-400-001  Installation of the NACA Vent Intake 
R  28-25-00-650-001  Pressure Defuel 
R  28-25-00-869-001  Fuel Transfer 
R  57-27-11-000-002  Removal of the Access Panel (540HB, 540JB, 540KB, 
R  540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 
R  550BB, 550CB, 550DB, 560AB, 640HB, 640JB, 640KB, 
R  ....) 
R  57-27-11-400-002  Installation of the Access Panel (540HB, 540JB, 
R  540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 
R  550AB, 550BB, 550CB, 550DB, 560AB, 640HB, 640JB, 
R  ....) 
R  28-12-43-991-003  Fig. 403 
R  3. Job Set-up__________ 
R  Subtask 28-12-43-941-059 
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 (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.

R  Subtask 28-12-43-860-055 
R  B. Aircraft Maintenance Configuration 
R  (1) Make sure that the applicable fuel tank is defueled (Ref. TASK 28-25-
R  00-650-001). 
R  (2) Make sure that the access platform is below the applicable access 
R  panels 540RB(640RB) and 550AB(650AB). 
R  (3) Make sure that the applicable access panels are removed (Ref. TASK 
R  28-10-00-910-002) ,(Ref. TASK 57-27-11-000-002), (Ref. TASK 28-12-47-
R  000-001): 
R  - FOR 212QM 
R  540RB, 550AB 
R  - FOR 213QM 
R  640RB, 650AB. 
R  4. Procedure_________ 
R  (Ref. Fig. 403/TASK 28-12-43-991-003) 
R  Subtask 28-12-43-420-056 
R  A. Preparation for Installation 
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) 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. 11-004). 
R  (2) Do an inspection of the component interface and/or the adjacent area. 
R  (3) Make sure that the parts retained from the removed component are 
R  clean and in the correct condition. 
R  (4) Lubricate the new O-ring (6) with FUELS (Material No. 01-001) or 
R  COMMON GREASE (Material No. 04-012).

R  Subtask 28-12-43-420-053 
R  B. Installation of the Float Vent Valve 212QM(213QM) 
R  (1) Install the new O-ring (6) on the vent float-valve (5). 
R  (2) Install the vent float-valve (5) on Rib 22 with the bolts (3) and the 
R  nuts (1). 
R  (3) Install the bonding strap (2) on the vent float-valve (5) with the 
R  bolt (4) (Ref. TASK 20-28-00-912-002). 
R  (4) Apply SEALANTS (Material No. 09-007) to the nuts (1) and the bolts 
R  (3). 
R  Subtask 28-12-43-710-053 
R  C. Operational Test 
R  (1) Make sure that the vent float-valve (5) moves freely. 
R  5. Close-up________ 
R  Subtask 28-12-43-410-054 
R  A. Close Access 
R  (1) Make sure that the work area is clean and clear of tool(s) and other 
R  items. 
R  (2) Install the applicable access panels (Ref. TASK 28-10-00-910-002), 
R  (Ref. TASK 57-27-11-400-002), (Ref. TASK 28-12-47-400-001): 
R  - FOR 212QM 
R  install 540RB, 550AB 
　
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