A. Not Applicable
 4. Procedure
_________
 Subtask 12-11-28-650-050

 A. Safety Precautions
 (Ref. Fig. 301/TASK 12-11-28-991-001)

R (1) You must obey the Fuel Safety Procedures (Ref. TASK 28-00-00-910-001) R when you refuel/defuel an aircraft.
 (2) Do not let the tanker go near the aircraft until the anti-collision lights have been set to OFF.

 Refuel Safety Area Figure 301/TASK 12-11-28-991-001
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 (3) Before you start the refuel/defuel procedure, make sure that all the electrical circuits in the fuel system are complete.
 (4) Do not spill fuel on the engines or the brakes. If you spill fuel on engines or brakes that are hot, it can cause fires.
 (5) Ground and bond the aircraft (Ref. TASK 12-34-24-869-001).
 NOTE : Bonding is essential, grounding is recommended.____
 (6) Move all the equipment and material which is not necessary for the refuel/defuel procedure out of the safety area.
 (7) On the panel 400VU, make sure that the ACCU PRESS on the triple indicator has sufficient pressure. If necessary, pressurize the Yellow hydraulic system (Ref. TASK 29-10-00-863-002).
 (8) On the panel 110VU, make sure that the PARK BRK is on.
 (9) If the MLG doors are open during the refuel procedure: - visually examine the tires and shock absorbers - make sure you will have sufficient clearance to the ground after the refuel is complete. 
R  (10) Make sure that the chocks are in this position: 
R R R R R R R  (a) If the ramp does not slope: - move the aft NLG chocks away from the tires. During the refuel, the NLG tires will roll aft as the MLG shock absorber compresses - make sure that the chocks do not touch the MLG tires. The weight of the fuel can lower the aircraft and cause the tires to catch the chocks. 
R R R R R R (b) If the ramp slopes: - make sure that all the chocks down from the tires touch the NLG and MLG tires - make sure that all the chocks up from the tires do not touch the NLG and MLG tires. 
(11) Make sure that there is no equipment below the aircraft which can cause damage. The weight of the fuel can suddenly compress the landing gear and lower the aircraft.
 (12) Before you start the refuel/defuel procedure make sure that these are available: - a fuelling supervisor or fuelling safety person - the correct fire-fighting equipment - approved persons to use the fire-fighting equipment.

 (13)
 Make sure that the overboard vent lines are not blocked. If they are blocked, damage to the fuel tanks can occur.

 (14)
 Make sure that the fuel tanker (or hydrant) contains the correct fuel. The correct fuels are shown in the Flight Manual (Ref. FM 2.04.00).

 (15)
 Make sure that the fuel tanker or the pump unit (if you use a hydrant to refuel the aircraft) is in the correct position.

 (16)
 Make sure that, if there is an emergency, you can move the fuel tanker/pump unit and the other equipment away quickly.

 (17)
 Do not operate the aircraft main engines during a refuel/defuel procedure.

 (18)
 APU starts or shutdowns are permitted during refuel/defuel procedures. If it is necessary to operate the APU, the limits that follow apply:

 (a)
 An APU start is not permitted during a refuel/defuel procedure if the APU has failed to start or an automatic shutdown has occurred.

 (b)
 You must complete a normal APU shutdown if a fuel spill has occurred during the refuel/defuel procedure.

 (19)
 Make sure that the electrical equipment you use will not cause a spark.

 (20)
 Do not refuel/defuel in bad weather conditions and electrical storms. Lightning is dangerous.

 (21)
 During the refuel/defuel procedure do not operate the aircraft external lighting.

 (22)
 During the refuel/defuel procedure do not fill the oxygen system or change the oxygen bottles.

 (23)
 During the refuel/defuel procedure do only essential aircraft maintenance and/or servicing that will not cause a spark.

 (24)
 Do not refuel the aircraft if a fire or engine overheat warning is displayed on the flight deck.

 (25)
 You are only permitted to replace or do small maintenance work on radio, radar and electrical equipment during refuelling.

 (26)
 You are not permitted to remove, install or test aircraft batteries or related equipment during refuelling.

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