TM 55-1550-307-13&P
WARNING
Installing the non-crashworthy ERFS
increases the potential for fires during
a crash. The number of personnel on
board the aircraft will be kept to the
minimum required to perform the
required mission. Additionally, all
personnel are required to be seated
with a lap belt during flight.
1-8. FUNCTIONAL DESCRIPTION. An over-all
description of the ERFS is provided in the following
paragraphs. A brief functional description of the ERFS
components and information on operational status is
also provided. The ERFS is illustrated in functional
block diagram, Figure 1-2.
a. The operation of each tank is independent of the
others when used in multiples greater than one. The
ERFS system (combined with the FMCP) allows any
one tank in a multiple installation to feed the aircraft's
main fuel tanks without the need to manually disconnect
or connect the feed lines.
b. After the ERFS tanks are installed on the
aircraft, the system is treated as part of the aircraft.
1-9. FMCP FUNCTIONAL DESCRIPTION. The fuel
management control panel houses the fuel pumps
utilized in fuel transfer operations. Selective fuel
management is incorporated to enable the operator to
operate either single or multiple pumps and tanks at his
discretion. Electrical power is furnished by the existing
aircraft power receptacles located at station 260.
1-10. EQUIPMENT CHARACTERISTICS, CAPABI-
LITIES, AND FEATURES.
a. The ERFS transports with ease due to the
design of the skid mounts and hoisting eye.
b. The ERFS provides 2320 gallons of usable fuel
for extended range missions.
c. The ERFS can be installed, operated, removed,
transported,
handled,
and
stored
in
all
climatic
conditions compatible with the CH-47D and MH-47D
helicopters.
d. The ERFS tanks are capable of being stored
five years without deterioration, provided the tanks are
sealed.
e. Fuel quantity can be accurately monitored in
flight within four percent of the actual quantity using the
liquid level indicators.
f. The system can also be defueled using standard
equipment.
g. The ERFS has redundant fuel feed capability in
all pump/tank combinations.
h. ERFS Servicing. The system tanks can be filled
by gravity (splash fill). System is capable of accepting
all types of aviation fuel to include JP-4, -5, and -8.
i. The ERFS can be used as a fare system,
providing 2320 gallons of fuel for refueling other aircraft.
j. The ERFS can be installed and used in a one
tank or multiple tank configuration as the mission
requires.
k. Accessibility to fuel filler port, liquid level
indicators, and fuel sample drain provide better means
for servicing the system.
I.
Mounting
angle
brackets
provide
easy
installation of FMCP and interchangeability from tank to
tank.
m. Tank access covers are fabricated with
spillproof rollover vent valve.
Change 2
1-7
