HELICOPTER. Army regulations require the grounding
of the helicopter when parked and during all fueling and
defueling operations. No electrical switches shall be
operated except those necessary for servicing during
fueling and defueling.
Fueler must exercise caution during fueling. If fuel
is spilled inside the aircraft, removal of cabin floor
panels may be required, aircraft purged with clean
water, and allowed to air dry. All spilled fuel must be
removed prior to continuing operation. See TM 55-
1520-240-23 for additional instructions, para 2-204.
This task covers:
a. Grounding procedures.
b. Refueling ERFS tanks.
Tools: Flashlight (explosion proof).
JP-4,-5,-8 (items 7, 8, 9, Appx D)
Refueling Adapter Nozzle, P/N AE82605R
Equipment Conditions: Same as gravity
Refer to Figure 3-2.
Ground the helicopter as required.
No aircraft electrical power or auxiliary
power unit is required when pressure
fueling or defueling.
Connect fuel hose ground wire (1) to tank receptacle
Remove dust cap from coupling assembly on hose
The ERFS vents must be open during
refueling and defueling operations. The
ERFS tanks cannot be exposed to
internal pressure of over 5 psi, or failure
Remove fuel filler port (4) cap.
Install pressure refueling adapter (5) to manifold
hose (3), and install fuel truck D-1 pressure hose (6) to
Refueling sequence. Tank 4, 3, 2, 1 rear to forward
due to a 2 degree nose up attitude of the aircraft.
After all tanks are filled, do not open all 4
tank cam levers at the same time. Fuel
will seek its own level and could cause
tanks 3 and 4 to overfill. This could
cause a fuel spill.
Ensure tank cam lever on tank to be filled is opened
and closed on other tanks. Isolate other tanks by
connected from cam lever to manifold TEE.
Start pressure refueling at no greater than 35 psi
truck delivery pressure and 150 gallons per minute
With an explosion proof flashlight, carefully watch
fuel level and stop refueling when level is up to top of
fuel filler port.
10. Close tank cam lever and proceed to the next tank
to be filled.
11. Close either side of hose coupling to isolate filled
tank before filling next tank.