Bell OH-58A - Shielded Cable Repair; Substitute Shielded Braid Repair

PROCEDURAL STEPS:
1. Prepare severed ends of cable for
pigtail method of shield terminations,
Figure 11-16, step a.
2.
Splice center conductor, Figure
11-16, step b, using a permanent splice
or by using one of the splicing proce-
dures in paragraph 11-9.
3. Use two splice connectors to add
short length of insulated wire as exten-
sion to complete shield connection,
Figure 11-16, step b.
4. Insulate repair, Figure 11-16,
step c.
5. Record BDAR action taken. When
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
OPTION 4: Substitute Shielded Braid.
LIMITATIONS: This is a temporary
repair.
PERSONNEL/TIME REQUIRED:
1 Soldier
1/2 Hour Per Wire
MATERIALS/TOOLS REQUIRED:
Substitute Shielded Braid
(item 10, Appx B)
Knife
Center Conductor Splice
(Item 10, Appx B)
Metal Screw Clamp, Sheath Connector,
or Equivalent
PROCEDURAL STEPS:
1.
Prepare severed ends of cable for
application of repair splice and
shielding, Figure 11-17, step a.
2. Select suitable shielding material
and slide over one end of severed cable.
TM 55-1520-228-BD
ELECTRICAL AND AVIONICS SYSTEM
Shielding must be long enough to overlap
the shielding on both sides of the cable
being repaired after the center conduc-
tor is repaired.
Shielding material can
be obtained from another shield cable or
ground cable material.
NOTE
It is essential that the shielding,
as well as the inner conductor, be
repaired properly to prevent elec-
tromagnetic interference (EMI)
problems.
3. Splice center conductor using a per-
manent splice or by using one of the
splicing procedures in paragraph 11-9,
Figure 11-17, step b. Insure center
conductor is insulated from shield.
4.
Slide shielding material over
repaired inner conductor and clamp at
shielding overlap areas, Figure 11-17,
step c.
5.
Record BDAR action taken. When
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
11-9. SHIELDED CABLE REPAIR SEGMENTS.
GENERAL INFORMATION: The electrical
wiring kit has wire replacement segments
to replace segments up to 9 inches in
length.
CAUTION
Make sure aircraft power is off.
Disconnect battery before touching
any wires.
LIMITATIONS:
Dependent on splice method
used to connect replacement segment.
PERSONNEL/TIME REQUIRED:
1 Soldier
1 Hour
11-21