Section IV. SERVICE/MAINTENANCE PROCEDURES
MAINTENANCE PROCEDURES . The AVUM
procedures include servicing, inspecting, and replacing
the ERFS tanks, FMCP, ECP, hose assemblies,
pressure switches, and fuel pumps.
SERVICE. The 600 gallon tanks will be
serviced with JP-4, -5, -8 fuel as required. Utilize splash
fill or pressure refueling techniques, Figures 3-1 and
· Assure tank filler caps are free of sand
and any other foreign matter.
· Check each tank internally for foreign
objects, sand and water, and remove as
appropriate. Ensure the inspection
includes the dump valve opening located
at the bottom front of each tank.
· Hoses and pump board must be opened
and inspected for foreign material or
damage prior to being installed.
· Inspect fuel filter for foreign material,
damage, and serviceability.
· Upon first fueling of each tank, use the
splash fill method with 25 to 50 gallons
of fuel in both the forward and aft fill
caps and be sure to wash all sides of the
·Obtain a fuel sample from each tank. If fuel
is found contaminated, defuel tank,
clean, and refill again as described
above. Repeat until an acceptable fuel
sample is obtained, then fill the tank to
the desired level.
This task covers:
Fuel servicing tanks.
Flashlight (explosion proof)
Personnel required: (4/MOS 67U)
Fuel JP-4, -5, -8,
(items 7, 8, 9, Appx D)
Refer to Figure 3-1.
Aircraft shutdown and all electrical
Refueling vehicle parked minimum of 10
feet from helicopter.
Helicopter on level ground parked at
least 50 feet from any structure.
Fuel vehicle grounded.
Fuel tank grounded to aircraft.
Connect hose grounding lead (1) to tank ground
Remove filler port cap (3).
Ensure that the tank cam lever dump valve is