Subtask 28-10-00-010-053
 F. To Get Access to the Inboard of RIB2
 (1) For the left wing: - open the surge doors 540AZ and/or 540BZ and install the HOOK-COVER (RIB 2 SURGE DOORS) (98D57004013000) and or the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000).
 (2) For the right wing: - open the surge doors 640AZ and/or 640BZ and install the HOOK-COVER (RIB 2 SURGE DOORS) (98D57004013000) and or the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000).
 Subtask 28-10-00-941-054 
R  G. Preparation of Person(s) and Equipment to go into the Fuel Tank 
R R R  WARNING : DO NOT GO INTO A FUEL TANK UNTIL THE FUEL-GAS CONCENTRATION IS_______ LESS THAN 10% OF THE APPLICABLE LEL (LOWER EXPLOSIVE LIMIT) (OR LESS THAN THE LOCAL REGULATORY-AUTHORITY LIMIT).
 WARNING : DO NOT REMOVE YOUR RESPIRATOR WHILE YOU ARE IN A FUEL TANK_______ (UNLESS THE FUEL-GAS CONCENTRATION IS LESS THAN 5% OF LEL (LOWER EXPLOSIVE LIMIT)). YOU WILL BECOME ILL OR DIE.
 WARNING : USE THE APPROVED PROTECTIVE CLOTHING WHEN YOU GO IN A FUEL_______ TANK.
 (1) Make sure that each person has two air-supplied respirators.
 (2) Make sure that the respirators operate satisfactorily before use.
 (3) Put on protective clothing.
 (4) Remove all the loose objects from pockets of overalls and remove all your personal jewelry.
 (5) Make a check list of all the tools and equipment you put into the fuel tank.
 (6) Make sure that the person in the fuel tank and the safety person agree to the safety signals between them.
 (7) Touch a known ground point to release the static electricity from your body, before you go into the fuel tank.

 (8)
 Remove the remaining fuel with a MISCELLANEOUS (Material No. 19-003).

 (9)
 Put protective mats on the bottom of the fuel tank in the work area.

 (10)
 Put all the tools and equipment in a non metallic container and of smaller dimensions than the internal tank openings.

 (11)
 When possible, safety all the applicable components with MISCELLANEOUS (Material No. 19-018) before you put them into the fuel tank.

 4. Procedure
_________
 Subtask 28-10-00-610-052

 A. Safety of Person(s) in the Tank
 (1)
 Continue to blow clean, filtered air through the tank while persons are in the tank. Continuously monitor the air in the tank (with the combustible gas indicator) to make sure the fuel gas concentration stays at a safe level.

 (2)
 Use only approved spark-proof lamps, spark-proof flashlights and tools when you are in the fuel tank.

 (3)
 Use only approved solvents and cleaning agents.

 5. Close-up
________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 28-10-00-410-053
 A. Close Access
 (1)
 Install any structure or equipment that was removed to complete the task.

 (2)
 Make sure that all of the bonding straps are in position and connected correctly. Make sure that they are not damaged or broken and show no sign of corrosion (Ref. TASK 28-00-00-200-001).

 (3)
 If applicable, remove the HOOK-COVER (RIB 2 SURGE DOORS) and/or the HOOK-COVER (RIB2-SURGE DOORS) from the surge door/s. Carefully close the surge door/s.

 1EFF : ALL 1 28-10-00Page 312 1 1 Aug 01/05 1 1 1CES 1 1EFF : ALL 1 28-10-00Page 313 1 1 May 01/04 1 1 1CES 1 Subtask 28-10-00-942-052

 (4) Make sure that you remove from the tank all the tools, equipment and cleaning materials on the check list.
 (5) Install all the access panels that you removed (Ref. TASK 57-27-11-400-001), (Ref. TASK 57-27-11-400-002), (Ref. TASK 57-17-11-400-001), (Ref. TASK 28-12-45-400-002), (Ref. TASK 28-12-46-400-001) or (Ref. TASK 28-12-47-400-001). 
R  **ON A/C 301-399, 
R  Subtask 28-10-00-410-053-A 
R  A. Close Access 
R R  (1) Install any structure or equipment that was removed to complete the task. 
R R R  (2) Make sure that all of the bonding straps are in position and connected correctly. Make sure that they are not damaged or broken and show no sign of corrosion (Ref. TASK 28-00-00-200-001). 
R R R  (3) If applicable, remove the HOOK-COVER (RIB 2 SURGE DOORS) and/or the HOOK-COVER (RIB2-SURGE DOORS) from the surge door/s. Carefully close the surge door/s. 
R R  (4) Make sure that you remove from the tank all the tools, equipment and cleaning materials on the check list. 
R R R R  (5) Install all the access panels that you removed (Ref. TASK 57-27-11-400-001), (Ref. TASK 57-27-11-400-002), (Ref. TASK 57-17-11-400-001), (Ref. TASK 28-12-45-400-002), (Ref. TASK 28-12-46-400-001) or (Ref. TASK 28-12-47-400-001). 
　
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