FUNCTIONAL DESCRIPTION

Figure 1-1. Extended Range Fuel System (Sheet 5 of 5).

Figure 1-2. Extended Range Fuel System Block Diagram

TM-55-1560-307-13P AH-1E/F/P/S Helicopter Manual
Page Navigation
7

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

Privacy Statement
Press Release
Contact