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F-16's Fast-track Through Flight Line Fueling

U.S. Air Force Tech. Sgt. John Moler, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, directs the pilot of an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 6, 2016.  Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

U.S. Air Force Tech. Sgt. John Moler, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, directs the pilot of an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 6, 2016. Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

U.S. Air Force Senior Airman Jeremy Jimenez, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, connects a fuel hose to an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 7, 2016.  Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

U.S. Air Force Senior Airman Jeremy Jimenez, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, connects a fuel hose to an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 7, 2016. Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

U.S. Air Force Staff Sgt. Charles Yetton, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, disconnects a fuel hose from an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 7, 2016.  Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek))

U.S. Air Force Staff Sgt. Charles Yetton, a crew chief assigned to the 169th Aircraft Maintenance Squadron of the South Carolina Air National Guard, disconnects a fuel hose from an F-16 Fighting Falcon fighter jet during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 7, 2016. Ground refueling while the engine is running, allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek))

U.S. Air Force Airmen of the 169th Logistics Readiness Squadron and the 169th Aircraft Maintenance Squadron refuel two F-16 fighting falcon fighter jets during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 6, 2016.  Ground refueling, while the engine is running allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

U.S. Air Force Airmen of the 169th Logistics Readiness Squadron and the 169th Aircraft Maintenance Squadron refuel two F-16 fighting falcon fighter jets during “hot-pit” ground refueling training on the flight line at McEntire Joint National Guard Base, S.C., Feb. 6, 2016. Ground refueling, while the engine is running allows aircraft to return to flight quickly during sortie operations and combat missions. (U.S. Air National Guard photo by Senior Airman Ashleigh S. Pavelek)

MCENTIRE JOINT NATIONAL GUARD BASE, S.C. - -- Airmen of the South Carolina Air National Guard demonstrated the need for speed last weekend as they accelerated six F-16 Fighting Falcon fighter jets through "hot-pit" ground refueling exercises here, February 6-7.

Keeping the F-16's engines running reduces the amount of time the jet is on the ground between flights from almost two hours to less than 45 minutes. 

"If the jets shut down, then maintenance checks have to be done. This can take hours to complete," said Maj. Justin Mock, chief of weapons and tactics and a pilot assigned to the 157th Fighter Squadron. "Refueling the jets while the engines are running allows us to save time by not having to do these checks."

Pilots at McEntire are required to fly six sorties per month. Hot-pit training qualifies the pilot for two sorties to reach their monthly goal; one sortie for each takeoff and mission flown.

The fighter jets taxied to the North Ramp of the flight line, where crew chiefs directed the pilots into position, connected the fuel hose and began fueling within minutes of the jet's arrival. The fueling process took approximately 10 minutes per jet and they were in and out of the pit in less than 30 minutes.   

"Each F-16 receives between 800 and 900 gallons of fuel in the hot-pit," said Senior Airman Emily Bocinski, a fuels specialist assigned to the 169th Logistics Readiness Squadron.

The R-11 Mobile Refueling Unit, fuel truck, arrived to the hot-pit, hauling its maximum capacity of fuel. Each truck can carry nearly 6,000 gallons, and distributed more than 4,500 gallons into the fuel tanks of the fighter jets. If necessary, the pumps are powerful enough to dispense 600 gallons per minute into a military aircraft.

Fueling an F-16 while the engine is running presents new hazards to the mission. 

"Hot-pit refueling is more dangerous than a normal refueling because the intakes and exhausts are running, so knowing the safety zones are critical," Senior Master Sgt. Mark Tanner, the B-Flight superintendent assigned to the 169th Aircraft Maintenance Squadron.

One of the greatest risks of this mission is a person or object being drawn into the intake,  Bocinski said. Foreign Object Debris, FOD, such as stones or equipment, may get drawn into the intake causing minor blade damage or it can destroy the entire aircraft engine.

"The blades of the engine spin at an incredible rate.  If a wrench gets ingested into an intake, it can cause catastrophic damage," said Tanner.

To ensure safety and procedure compliance during the exercise, a quality assurance inspector was present. The base has been performing hot-pit refueling exercise since 2007.