1. Secure all electronic and electrical switches on the aircraft not required for fueling. Once a fueling evolution has commenced, the aircraft’s electrical power status and connections are NOT to be changed until the evolution is completed. This means the follow- ing: a. NO aircraft engines or auxiliary power units will be started or stopped. b. External power will NOT be connected, disconnected, or switched on or off. c. Changing the aircraft’s electrical power status can create significant ignition sources. 2. Verify that manned fire-fighting equipment is in the area. The flight deck P-16 is manned by crash and salvage personnel when aircraft are aboard, and satisfies this requirement for fueling on the flight deck. On the hangar deck, if no roving fire-fighting equipment is manned, the fuel crew must have a portable fire extin- guisher manned nearby. 3. Take a sample if needed for quality surveil- lance checks. The hose (not the entire station) is consid- ered ready for use if an acceptable fuel sample was taken under normal flow conditions within the preceding 24 hours. If this has not occurred, the hose MUST be flushed through the flushing connection into the se- lected contamination tank, and a sample taken and tested for contamination prior to refueling the first aircraft. Fueling must NOT begin until acceptable sam- ple results are obtained. The Maximum allowable limits for sediment and water contamination are 2 milligrams per liter (2mg/1) for sediment, and 5 parts per million (5ppm) for free water. 4. Check for “hot brake” condition (plane cap- tain). 5. Ensure that the aircraft has initial tiedowns. Aircraft tiedowns will not be removed or altered during the aircraft refueling evolution. 6 . aircraft. metal. 7 . 8. Attach the grounding wire from the deck to the Grounding connections must be made to bare Position the fuel hose. Remove refueling adapter cap from the aircraft and the dust cover from the pressure nozzle. Inspect the face of “the nozzle and make sure it is clean. Inspect index pin area for excessive wear. Verify that the flow control handle is in the fully closed and locked position. 9. Visually inspect the aircraft’s adapter (recep- tacle) for any damage or significant wear. If there is any doubt about the integrity of the adapter, notify the squadron representative. NOTE Refueling will not be performed unless qualified squadron personnel are present. CAUTION A worn or broken adapter can defeat the safety interlocks of the refueling nozzle, per- mitting the poppet valve to open and fuel to spray or spill. 10. Confirm that the switch on the nozzle quick- disconnect coupling (QDC) is in the OFF position. 11. Lift the nozzle by lifting the handles; align the lugs on the nozzle with the slots on the aircraft adapter; and connect the nozzle to the aircraft by pressing it firmly onto the adapter and rotating it clockwise to a positive stop. The nozzle must seat firmly on the adapter and not be cocked. 12. Upon receiving signals from the nozzle opera- tor that hook-up is complete and from the plane captain that he is ready to begin the fueling operation, the station operator opens the defueling pump discharge valve, the Cla-Val cutout valve, and the hose reel cutout valve. After checking the gauge for the station supply riser to ensure fuel pressure is available, the station operator starts the defuel pump. The station operator must remain in position at the station controls throughout the fueling operation. 13. Place the quick-disconnect switch in the ON (fuel) position. This energizes the solenoid-operated pilot valve (SOPV) for the Cla-Val and places it in the fueling position. CAUTION The flow control handle of the pressure nozzle must be placed in either of two locked positions: fully open or fully closed. The handle is NOT to be used as a flag to indicate fuel flow. Excessive wear on the aircraft adapter and the fuel nozzle poppet will result if the handle is allowed to “float” in the unlocked position. 5-19