Section III. ERFS INSTALLATION

Figure 2-1. ERFS Tank Loading with Forklift

Figure 2-3. ERFS No. 1 Tank Installation and Tiedown

TM-55-1560-307-13P AH-1E/F/P/S Helicopter Manual
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TM 55-1560-307-13&P Section III. ERFS INSTALLATION 2-5. INSTALLATION. The ERFS will require four persons and approximately three hours for installation. The tanks can be installed on aircraft with or without the helicopter internal cargo handling system (HICHS) if aircraft has been modified. A standard tool kit (NSN 5180-00-323-4692) will be needed for installation of the system. System kit will include four bonney wrenches. For ERFS tiedown configurations, refer to Table 2-2. 2-6. ERFS INSTALLATION PROCEDURES. The following tiedown configurations are typical installation of one to four tanks installed. Depending on loading configurations, the tanks position can be moved forward or aft depending on mission needs; however, the helicopter CG must be maintained within limits and the number of tiedowns cannot be reduced. Refer to paragraph 2-8 for installation of system with pallets. Install the ERFS tanks and system components as follows: WARNING • Use a one ton or larger forklift. Damage of equipment or injury of personnel may occur if a ground guide for forklift operations is not used. Refer to Figure 2-1. • Tank must be loaded to be within the CG limits of the aircraft. NOTE The installation sequence described covers a four tank installation. The helicopter may be operated with one to four tanks, depending on mission needs, provided tank installation and fuel transfer management are such that aircraft CG be maintained within limits. In addition, the tiedown configuration is depicted for a four tank installation when no other loads are being carried. If less than four tanks are being used, the tanks may be moved forward or aft depending on internal/external loads and main- taining CG. The number of tiedowns per tank as shown in Table 2-2 will not be reduced. a. Ground aircraft. b. Position No. I tank at station 190 butt-line eleven left. Tilt tank and position wood shoring under skids. Align groove of shoring to aircraft extrusion rail. c. Tie down No. 1 tank as shown in Figures 2-2, 2- 3, and 2-11. Use Table 2-2 to select the straps required. WARNING Chains will not be used to tie down the ERFS. NOTE • No more than 1/2 twist allowed on tiedown strap. • Minimum 1-1/2 wraps required on rachet drum of tiedown strap. Figure 2-2. Installation and Tiedown Straps 2-4

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