2-15-7. Gravity Refueling. Perform the following
Be sure the helicopter is at least 50 feet from any
hangar or structure.
Be sure the fueling vehicle is at least 10 feet from
Electrically ground the helicopter as follows:
Connect one end of an approved ground
cable to the aft landing gear eyebolt or to one of the jacks
on the side of the fuselage. Grounding jacks are located
at sta. 115 on the RH side and sta. 530 on the LH side in
the fuselage skin. Connect the other end to a grounding
rod or ramp ground point. Make sure the cable has no
broken strands and the clip are securely attached to the
cable and ground points.
Make sure the fueling unit is grounded to the
same ground rod or ground point as the helicopter.
Before opening the filler cap, ground the
nozzle to the ground jack directly above the fuel tank
When the fuel is at the desired level, remove the
nozzle. Secure the filler cap. Then, disconnect the nozzle
Remove the ground connection. If the helicopter
is to remain parked, do not disconnect the helicopter
2-15-8. ERFS Refueling and Fuel Transfer.
ERFS Refueling and Fuel transfer will be in accordance
with existing Air Worthiness Release (AWR).
2-15-9. ERFS II Refueling.
Refueling the ERFS II tanks is performed by either single
point pressure refueling or gravity refueling.
The manually operated fuel/defuel vent
valve on each tank must be placed in the
closed position following pressure refue-
ling. Failure to do so could permit signifi-
cant fuel leakage in the event of a crash
and the vent selfsealing breakaway valve
fails to actuate.
If the fuel/vent valve is not opened, the
tank cannot be pressure refueled.
Single Point Pressure Refueling. The ERFS II
tanks are single point pressure refuled from a connection
at the motorized gate valve. The motorized gate valve
must be open to pressure refuel and is controlled by the
refuel valve switch on the ERFS II fuel control panel
located on the forward most ERFS II tank installed. The
fuel transfer hose is connected to the forward intercon-
necting ERFS II fuel manifold. Fuel from the transfer
hose passes through the breakaway valve and the
manual fuel/defuel valve to the lower fuel/shutoff valve in
the tank bottom.
The operator must exercise caution to
avoid ERFS II tank overflow during gravity
refueling. There is no automatic fuel flow
Gravity Refueling. If pressure refueling of ERFS
II tanks is not performed or prevented, each tank can also
be gravity filled through the gravity filler opening on the
top of each tank. To gravity fill, the crashworthy filler cap
is removed and external fuel source nozzle is inserted
and the tank is filled. Low pressure flow rates must be
maintained as venting or vapors bypass the filler opening
and the fuel/defuel vent valve is closed during this opera-
tion. Because fuel is not entering the tank through the
fuel/defuel line, the high level shutoff valve has no effect
stopping the fuel flow into the tank.
2-15-10. Single Point Pressure Refueling.
Electrical ground Connect electrical ground
from refueling aircraft. Check that the ground wire from
each ERFS II tank is connected to an aircraft ground
Fuel hose from refueling source Connect to
aircraft single-point pressure refueling connection.
Single-Point Pressure Refueling Hose
Assembly - Unisex valve at the ERFS II tank OPEN.
Manual FUEL/DEFUEL VALVE at each tank as-
REFUEL STA switch located on the overhead
FUEL CONTR Panel ON.
REFUEL VALVE switch on the ERFS II Fuel Con-
trol Panel OPEN. IN TRANSIT light will briefly illuminate
Refuel the ERFS II tanks. Fuel flow will automati-
cally stop when tanks are full.
FUEL QUANTITY switch Set to 1, 2, 3, and
TOTAL to confirm tanks and system contain desired fuel
REFUEL VALVE switch. CLOSE. IN TRANSIT
light will briefly illuminate.