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
