Bell OH-58A Technical Manual page 236

TM 55-1520-228-BD
FLIGHT CONTROLS SYSTEM
copilot's and pilot's cyclic, collec-
tive, and tail rotor controls to the aft
flight control components. See Figure
13-1 for a schematic of the system, and
refer to Figures 13-2 thru 13-5 for a
complete detail on each individual
system and Figure 13-6, Table 13-2, for
dimensions of tubes. Make all necessary
repairs on all flight control tubes
using one of the two options provided in
this section. Insure that splice
repairs, option 1, do not cause any
interference at bulkhead lighting holes
or adjacent components.
Splicing, Tubes, Flight
OPTION 1:
Control.
Inspect after every
LIMITATIONS:
flight.
PERSONNEL/TIME REQUIRED:
1 Soldier
2 Hours
MATERIALS/TOOLS REQUIRED:
Metal Sleeve
Angle Stock
Bolts
PROCEDURAL STEPS:
1. Put aircraft flight control system
into neutral rig.
2. Disconnect and remove damaged
control tube from aircraft.
Trim damaged area.
3.
4. Using Table 13-2 and Figures 13-2
thru 13-5, select a metal splice,
either inner or outer whichever is more
suitable, and drill at least two
bolt/rivet holes on each end of the
tube. Refer to Table 13-3 for
bolt/drill sizes to use on different
size tubes. Holes should go through the
splicer and the damaged tube, and should
be positioned in a cross pattern, Figure
13-7. Make sure that the original
center to center, length b, Figure 13-6,
is maintained.
13-4
5.
Reinstall tube after repair is
accomplished, and check for binding or
interference by manually moving the
appropriate controls: cyclic, collec-
tive, or pedals.
6. Record BDAR action taken.
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
Fabricating, Tubes, Flight
OPTION 2:
Control.
Inspect after every flight.
LIMITATIONS:
PERSONNEL/TIME REQUIRED:
1 Soldier
3 Hours
MATERIALS/TOOLS REQUIRED:
Tube Stock (about same dia. as original
tube, 0.032 in. min. wall thickness)
Drill and Bit
PROCEDURAL STEPS:
1. Put aircraft flight control system
into neutral rig.
2. Remove damaged flight control tube,
Figure 13-8.
3. On the end that fits into the clevis
bolt, mash the tube so that it fits into
the arms of the clevis.
of clearance between the clevis arms
should be allowed, Figure 13-9.
off the end of the mashed tube, Figure
13-10. Drill a hole through the tube
and install the bolt.
4.
On the end where the clevis bolt
would normally fit, mash the tube only
enough to fit over the bearing assembly
with some clearance. Round off the end
of the tube, Figure 13-11.
When
A small amount
Round