content_image/533983.jpg
This checklist must be completed prior to start of wet fuel cell entry and/or at shift change PRIOR to work assignment for the continuation of tank work started by a previous shift. 

Wet fuel cell entry location 

<img src='content_image/533983.jpg'>

Figure 14-92.  Fuel tank checklist entry. 

fire can be put out with a typical carbon dioxide (CO$_{2}$) fire extinguisher. Aim the extinguisher nozzle at the base of the flame and spray in a sweeping motion to have the agent fall over the flames to displace the oxygen and smother the fire. Dry chemical fire extinguishers rated for fuel can also be used. These leave behind a residue that requires cleanup that can be extensive and expensive. Do not use a water-type extinguisher. Fuel is lighter than water and could be spread 

without being extinguished. Additional precautions used to prevent fire are discussed below in the fueling–defueling section of this chapter. 

## Fuel System Servicing 

Maintaining aircraft fuel systems in acceptable condition to deliver clean fuel to the engine(s) is a major safety factor in 

