TM 55-1680-358-12&P
2-7. Aircraft Preparation. Prepare the aircraft for safe
ground maintenance as follows:
a. Cleaning. Before attempting to install the
Helicopter Internal Cargo Handling System, the floor of
the aircraft should be cleaned of all dirt and debris.
b. Preparation. After the floor has been cleaned,
proceed as follows:
NOTE
Loading pole ground able is secured to
retaining brackets. Detach the ground
cable to aircraft in or near the same
location.
CAUTION
Ensure loading pole grounding cable is
outboard of outboard rail/roller
assembly, stations 272.531 to 374.000
(3 and 4, Figure 3-2) at installation.
(1) Remove loading pole retaining brackets
located at stations 327.680, 348.980 and 387.680 on
right-hand side of aircraft (Figure 2-1) and discard
brackets.
(2) Remove the aircraft ramp extensions
from the ramp. Locate the master drill fixture, Part No. B
18049 140-MDF, over one of the ramp extensions, as
shown in Figure 2-2. Make sure the alignment pins are
snug against the ramp extension. Use at least two C-
clamps to hold the fixture in position.
CAUTION
Drilled holes must be within tolerance,
clean and free of burrs to ensure proper
engagement of pins.
(3) Drill first two holes (0.396 to 0.403 inch
diameter). Drill one at each end, using the fixture drill
guide holes (Figure 2-2).
(4) Repeat steps 2 and 3 for remaining ramp
extension.
Figure 2-1. Loading Pole Retaining Bracket Locations
2-4
