14. When the hose is fully charged, rotate the
nozzle flow control handle to the FULL OPEN position.
The handle must rotate 180 degrees to insure that the
poppet valve is fully open and locked.
15. Once fuel flow has been established, squadron
personnel will exercise the aircrafts pre-check system.
The pre-check system simulates the com-
pletion of refueling by closing all the tank shut-
off valves within the aircraft. All fuel flow into
the aircraft should stop within a few seconds to
1 minute of actuating the pre-check system.
The primary means of detecting successful pre-
check is by observing the flow indicator on the
aircraft. If the aircraft is not configured with the
indicator, an alternate method is to observe the
jerk and stiffening of the refueling hose and/or
the pressure spike that occurs at the refueling
station. If an aircraft fails pre-check, it can be
cold refueled only if procedures are called out
in that specific aircrafts NATOPS.
16. Fuel the aircraft as directed by the flight plan.
The plane captain will monitor aircraft vents, tank pres-
sure gauge(s) and/or warning lights as necessary. The
plane caption is also responsible for ensuring that the
aircraft is fueled to the correct fuel load.
17. When directed by the plane captain, rotate the
nozzle flow control handle to the OFF and fully locked
18. Place the quick-disconnect switch in the OFF
position. This deenergizes the solenoid-operated pilot
valve (SOPV) and places the Cla-Val in the defueling
19. When the hose is evacuated, disconnect the
nozzle from the aircraft adapter, replace the adapter cap,
and remove the ground wire from the aircraft, then the
20. Move to next aircraft to be fueled. After all
aircraft have been fueled, secure the refueling station.
21. Restow the hose.
Aircraft Pressure Refueling With
Engines Operating (Hot Refueling)
Hot refueling procedures are the same as the Cold
Refueling procedures listed above except for the fol-
lowing additions and precautions:
1. The aircraft pilot will select fuel loading, ensure
that the cockpit switches are in the proper positions, and
maintain UHF radio contact with Primary (Air Boss).
2. The pilot will secure all electronic and electrical
equipment not required for refueling.
3. The pilot will place all armament switches in the
4. The aircraft must NOT be hot refueled if it fails
pre-check. Failure of the pre-check indicates a malfunc-
tion in the aircrafts fuel system, which can result in a
fuel spill and fire.
5. The aircraft canopy and helicopter side doors
will remain closed during the entire fueling evolution.
6. Be extra cautious around intakes and exhausts.
Assume both engines on a dual-engine aircraft are op-
erating. Although some aircraft can and do shut down
the engine on the side where the refueling adapter is
located (F-14), most aircraft currently do not (F-18,
7. Pilot-in-command changes are not permitted
during refueling operations.
8. No static samples are to be taken during hot
Hot refueling is performed with the pres-
sure nozzle only.
Overwing (gravity) refueling can be performed
only with the engines off. Overwing refueling proce-
dures are the same as cold refueling procedures, ex-
cept for the following additions:
Fueling with an overwing nozzle requires
skill and patience because of the increased
chance for a spill. ALWAYS use extreme cau-
tion when fueling this way and NEVER block
the overwing nozzle in the open position.
1. Overwing nozzles must be grounded to the
aircraft (or support equipment) prior to inserting the
2. After inserting the nozzle in the fueling recep-
tacle, make sure metal-to-metal contact between the
nozzle and the fueling port is maintained throughout the