Fuel Vent Systems - phillips66aviation-nataplst.com

1 fuel VENT Systems Since the basis of the single point refueling system is to deliver under pressure, the aircraft s fuel vent system plays an important role in the operation of the aircraft s fuel system . Essentially, the aircraft must be able to constantly vent the air that is displaced as the fuel enters the aircraft tank(s). This venting process is critical to ensure that over pressurization of the internal plumbing and tanks does not occur. Typically, aircraft vents are located on the outboard, underside sections of the wings, near the wingtips. When refueling certain business aircraft which utilize the single point system , you must always check the aircraft s fuel vents immediately after commencement of refueling, to ensure that fuel system venting is occurring.

2 Verification is easily accomplished by confirming that air is being released out of each aircraft fuel vent. On some aircraft, prior to commencement of refueling operations, pressure within the fuel system must be released before refueling can being. In addition, in the event that the fuel shutoff system has failed or if a shutoff valve has not closed properly, the fuel vents are also designed to route excess overboard and relieve pressure within the system once the tank(s) have reached their maximum capacity. Be prepared to shut off the flow of fuel immediately if fuel is pumped overboard. Each fuel spill, no matter how small, must be cleaned up in accordance with all local and federal guidelines.

3 Personal protective equipment must also be utilized. fuel VENT Systems NATA SAFETY 1ST PROFESSIONAL LINE SERVICE TRAINING 2007