Floor patches will be handled on an
individual basis from aircraft to aircraft.
(1) If floor repair patches are present, they
could cause interference to Helicopter Internal Cargo
Handling System installation. Modification to the rail/
roller assemblies (1 through 6, Figure 3-2) will then be
necessary. Refer to paragraph 2-8b.(6)(i) for floor patch
modifications, if required, and then complete installation
10k tiedown fitting assemblies are located
at stations 240.000, 320.000, 400.000
and 481.780 on both sides of the aircraft.
(2) Remove eight 10k rings by unscrewing
from fitting assemblies (Figure 2-3).
(3) The four screws securing each 10k
tiedown fitting assembly (Figure 2-3) should be removed.
Remove one of the inboard screws holding the 10k
tiedown fitting assembly. Install one of the two special
bolts (41, Figure 3-2) and flat washer (40) to keep the
tiedown adapter aligned with holes.
(4) Remove the remaining screws holding
the 10k tiedown fitting assembly. Stow the 10k rings and
screws in a secure place aboard the aircraft (Figure 2-3).
There may be a protruding round head
bolt beneath the aft most 10k tiedown
fitting. If so, remove and discard this
Ensure bolts are tightened down snugly
so that washers under bolt heads will not
(5) Install eight 10k fitting assemblies (22,
Figure 3-2) at the eight locations from which the 10k rings
and screws were removed in Figure 2-3 and steps 2-
8b.(2) through 2-8b.(4). Proceed as shown in Figure 2-4.
Install inboard special bolts (41, Figure 3-2) and flat
washers (40) finger tight. Slide 10k fitting assembly (22)
into position (under the washers and bolts) through the
open slots of the 10k fitting assembly. After 10k fitting
assembly (22) is in place, insert 12-point bolts (39) and
flat washers (40) and then tighten all four bolts.
(6) Install outboard rail/roller assemblies (1
through 6) according to the following steps. This
procedure is typical for all outboard rail/roller assemblies.
Rings of 10k fitting assemblies (22) must
be laying flat for installation of outboard
rail/roller assemblies (1 through 6).
Orient all 5k tiedown fitting assembly (21)
rings to face inboard before installing
outboard rail/roller assemblies (1 through
(a) Lift outboard rail/roller assembly (1 through 6)
over 10k fitting assembly (22).
(b) Angle outboard guide rail (47, Figure 3-3; 24 or
42, Figure 3-4; or 51, Figure 3-5) such that bumper is
clear of or just touching buffer board (Figure 2-5). The
buffer board may be trimmed, as required, for installation
At station 481.780, self-locking nut (46,
Figure 3-5) will not allow excessive
movement fore and aft. This prevents
interference with 10k fitting assembly (22,
(c) Rotate outboard guide rail (47, Figure 3-3; 24 or
42, Figure 3-4; or 51, Figure 3-5) outboard to vertical.
Some fore and aft movement may be necessary to do this
if interference occurs (Figure 2-5).
(d) Attach both outboard rail/roller assemblies (1
and 2, Figure 3-2) to the two forward 10k fitting
assemblies (22), at station 240.000. Refer to Figures 2-5
Ensure loading pole grounding cable is
outboard of outboard rail/roller assembly,
stations 272.531 to 374.000 (3 or 4,
Figure 3-2), at installation.
(e) Attach outboard rail/roller assemblies, stations
272.531 to 374.000 (3 and 4) to 10k fitting assemblies
(22) at station 320.000. Refer to Figures 2-5 and 2-6.