SECTION IV. EXTENDED RANGE FUEL SYSTEM (ERFS) AND ERFS II
The ERFS is a non-crashworthy auxiliary
fuel system. The use of a non-crashworthy
internal extended range fuel system may
compromise the helicopters crashworthi-
ness and may increase the risk of burns in
a potentially survivable accident.
4-4-1. Extended Range Fuel System
The ERFS provides mission flexibility as
an extended range mission kit and a for-
ward area refueling source. The ERFS is
mounted on the left side of the cabin be-
tween sta 190 and 450, depending on the
helicopter CG limits. The ERFS is a modu-
lar, interconnected system composed of
up to four 600 gal non-crashworthy metal
tanks, four electrically operated fuel
pumps, and a vent system with associated
wiring and plumbing. The tanks are se-
cured using 5K and 10K pound cargo
straps. The fuel management control pan-
el (FMCP) is housed in an aluminum box
and is mounted on the forward most tank.
Refer to TM 55-1560-307-13&P for installa-
tion, operation, and maintenance proce-
Chains will not be used to tie down the
FMCP will not be operated without fuel in
the tank(s), or with tank cam lever in the
A fuel sample is required before the first
flight of the day.
Hot refueling is not recommended.
For clarity, the tanks are numbered front to
rear 1,2,3,4. In order to maintain helicopter
CG, suggested tank burn is 4, 1, 3, 2.
Extended Range Fuel System II.
The Extended Range Fuel System II (ERFS II) is an
internal tank fuel system that provides the CH-47D with
the ability to fly for an extended period of time without
having to land for refueling. The ERFS II may be installed
in one, two or three tank applications in addition to the
Forward Area Refuel Equipment (FARE) kit installation.
Through the use of a FARE kit, the CH-47D can also be
used to ferry fuel to forward areas to support refueling
operations of other aircraft and equipment. The system
consists of five functional components: the fuel tank as-
sembly with fuel and vent hoses, restraint system, ERFS
II Fuel Control Panel, and FARE kit assembly. Refer-
ences and illustrations provided describe the three tank
and FARE kit installation. Power is supplied to the ERFS
II from the No. 1 DC BUS and No. 1 AC BUS through LH
Utility Receptacles and wiring harness to the ERFS II
Fuel Control Panel. Refer to TM 55-1520-240-23 and tM
1-1560-312-10 for installation and maintenance proce-
4-4-3. ERFS Capabilities.
The ERFS provides up to 2320 gallons, (580 gal-
lons maximum per tank) of usable fuel for extended
The ERFS can be installed, operated, removed,
transported, handled, and stored in climatic conditions of
32_C to +52_C.
The ERFS can be installed and used in a one tank
or multiple tank configuration as the mission requires.
Fuel quantity can be accurately monitored in
flight within four percent of the actual quantity using the
liquid level indicators.
The ERFS can be refueled using the splash fill or
pressure fill techniques.
The system can also be defueled using standard
The ERFS has redundant fuel feed capability in
all pump/tank combinations.
Fuel transfer pump system can operate with
APU, engine, or external power applied.
The ERFS can be used as a forward area refuel-
ing equipment (FARE) system, providing 2320 gallons of
fuel for refueling other helicopters.
4-4-4. Fuel Tank Assembly.
The ERFS II fuel tank assembly consists of an outer
aluminum honeycomb and fiberglass shell container,
ballistically self-sealing bladder, plumping module, fuel
hose, vent hose assembly, and ground cable. Each tank
measures 58 inch L x 62 inch W x 64 inch H with the