(3)  
Stop the refuel operation if any conditions change which could cause an unsafe condition for persons or equipment.

C.  Fuel Spills
(1)  
Each fuel spill event is different.  Variables such as the size of the spill, weather conditions, equipment location, aircraft occupancy, emergency equipment and personnel available will determine the correct response to control the fire hazard.

(2)  
During a refuel operation, continuously monitor the airplane for fuel leaks and spills.

(3)  
If a fuel spill occurs, do these steps:

(a)  
Stop the fuel flow.

(b)  
Unload and shutdown the APU. Do the usual APU shutdown procedure (Refer to Chapter 49).

(c)  
Follow the fire department and operator provided fuel spill and fire protection emergency procedures.

(d)  
Find and correct the cause of the fuel spill.

(e)  
Inspect enclosed areas to make sure they are free of fuel vapor.

(f)  
Do not begin the refuel operation or start the APU again until the fire department or the person(s) in charge have given approval.

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D.  Passenger Precautions
(1)  
Obey all airport and operator procedures if you refuel the airplane with passengers onboard.

WARNING:  OBEY THE SUBSEQUENT PASSENGER PRECAUTIONS DURING A REFUEL OPERATION.  IF YOU DO NOT OBEY THESE REQUIREMENTS, INJURY TO PERSONS CAN OCCUR.

(2)  
For each airplane type, a hazardous area must be identified for boarding or unloading passengers during a refuel operation.  Barriers must be in position to stop passengers from entering this hazardous area.

E.  Airplane System Precautions
(1)  
Do not operate these systems during a refuel operation:

(a)  
Weather mapping radar

(b)  
HF communications system

(2)  
Do not do these maintenance tasks during a refuel operation:

(a)  
Re-start an APU if that APU experienced an automatic shutdown or a failed start attempt during its' previous operation unless refueling is suspended.

(b)  
Connect or disconnect the battery chargers, aircraft ground-power generators or other electrical ground-power

(c)  
Fill or change oxygen bottles

(d) 
 Remove electrical power.

NOTE:  Damage to the refuel system components can occur.

(e)  
Begin a refuel operation if a fire or engine overheat condition exists

(f)  
Begin a refuel operation if any part of the landing gear is unusually hot.

(3)  
Make sure these components are in the closed position before you begin the refuel operation:

NOTE:  Fuel spills, damage to the airplane or inability to close doors can occur if these components are not closed.
(a)  
Wing pressure relief valves (if installed)

(b)  
Landing gear doors

(c)  
Overwing entry doors (if installed).

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(4)  
Damage or wear at the fueling receptacle adapter can cause fuel leaks.  Do these maintenance actions to prevent fuel leaks:

(a)  
Make sure the mating surface of the fuel hose and fueling receptacle adapter are clean and free from unwanted material.

(b)  
Make sure the slots and lugs on the adapter are not damaged.

(c)  
Use a wear gauge to make sure the adapter is within operational limits.

(5)  
Make sure the landing gear wheel chocks do touch the tires.  The wheel chocks can wedge against the tire after you add fuel.

(6)  
A refuel operation with a main engine operating is an emergency procedure. Obey all airport and operator provided emergency procedures.

F.  APU Operations During Refueling and Defueling - Limits and Precautions
(1)  
Obey the limits for APU operation (AMM 49-11-0/201).

WARNING:  OBEY THE LIMITS AND PRECAUTIONS FOR APU OPERATION DURING REFUELING. IF YOU DO NOT OBEY THESE LIMITS AND PRECAUTIONS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

(2)  
You can start the APU during a refueling operation if the start is an initial start or a restart after normal shutdown.

(3)  
You can shutdown the APU (manual or automatic) during a refueling operation.

(4)  
If there is a protective automatic shutdown or failure to start condition on the APU, stop the refueling operation and disconnect the fuel hose from the airplane fueling receptacle adapter before you start the APU again.
　
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