Figure 4-2. HTARS setup.
PART C - OPERATION
Preparation for Operation. Ensure all safety precautions have been taken. Verify that all safety and
fire-Figurehting equipment is in place and serviceable. Check landing lights if they are required. Perform
daily and before operations checks on the HEMTT tanker IAW TM 9-2320-279-10-1 (Operators Manual for
M977 Series HEMTT) and on the HTARS TM 5-4930-237-10 (Operator's Manual for HEMTT Tanker
Aviation Refueling System (HTARS)). Inspect the discharge hoses, valves and fittings, nozzles, and
grounding systems. Ensure that all refueling personnel have and are wearing the proper protective clothing.
As soon as the system is full of fuel and ready to operate each day, draw a sample from each nozzle. The
recirculation nozzle is equipped with a built-in fuel sample port. If the fuel does not pass tests and
inspections, not use it. Isolate it, resample it, send the sample to the supporting laboratory, and await the
laboratory's instructions on disposition.
Sequence of Operations. The HTARS has two primary modes of operation, refuel and recirculation.
In the refueling mode, fuel is pumped from the HEMTT tanker through the system hoses to the refueling
points (nozzles). In the recirculation mode, the refueling nozzle (CCR or D-1) is disconnected from the
refueling point and the recirculation nozzle is connected. The recirculation nozzle is connected to the
HEMTT tanker and fuel circulates through the system hoses and back to the tanker. The HTARS can
operate in both modes at the same time.
Refueling Mode. To operate the HTARS in the refueling mode, ensure that personnel follow these
Start and operate the HEMTT tanker IAW TM 9-2320-279-10-1.
Ensure the soldier manning the nozzle guides the aircraft into position using signals. Check with the pilot
to be sure that all armaments are on SAFE.
Deplane the crew and passengers. Passengers must go to the designated passenger marshaling area.
Members of the crew, except the pilot or copilot who may remain at the controls if necessary, should
deplane and assist with the refueling. Ensure that personnel man fire extinguishers at all times during
Ensure the pilot notifies his commander that he will be off the air during refueling. He may monitor his
radios during refueling, but he should never transmit. The crew chief and pilot may talk by intercom
NOTE: Ground the aircraft. Grounding of aircraft during refueling is no longer required by NFPA standards
77 and 407. Grounding will not prevent sparking at the fuel surface.
Bond the nozzle to the aircraft in one of two ways. Either insert the bonding plug into the plug receiver or
attach the clip of the nozzle bonding cable to a bare metal part of the aircraft other than the antenna.