Bell OH-58A Technical Manual page 256

TM 55-1520-228-BD
ENVIRONMENTAL CONTROL SYSTEM
PROCEDURAL STEPS:
1. Locate damaged area and remove
panels and/or other items as necessary
to gain access to the duct to be
repaired. Refer to Figures 15-2 and
15-3 for locations of rigid plastic
ducts.
2. Cut a patch out of sheet stock.
3. Tape into place.
4. Record BDAR action taken.
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
OPTION 2: Hole or Crack in Duct, Rigid
Plastic.
Inspect after every flight.
LIMITATIONS:
PERSONNEL/TIME REQUIRED:
1 Soldier
1 Hour
MATERIALS/TOOLS REQUIRED:
0.016 inch Sheet Metal Minimum
Sealant (item 4, Appx C)
400 Grit Sand Paper (item 45, Appx C)
Cleaner Naptha or Equivalent
(item 7, Appx C)
Glass Tape or Aluminum Tape
(item 60, Appx C)
PROCEDURAL STEPS:
1. Locate damaged area and remove
panels and/or other items as necessary
to gain access to the duct to be
repaired. Refer to Figures 15-2 and
15-3 for locations of rigid plastic
ducts.
2. Cut a patch out of sheet stock.
Patch should extend 1-1/2 inches from
the edge of the hole at all points.
15-8
3. Stop drill any cracks which might be
extending from hole.
4.
Sand both the bottom surface of the
patch and the surface area around the
hole to be covered by the patch.
5.
Clean surface with solvent.
6. Apply sealant to patch and on the
surface area that will be covered by the
patch.
7. Press patch in place, and wrap glass
When
tape around patch and duct to hold the
repair in position.
8.
Record BDAR action taken.
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
15-6.
GENERAL INFORMATION:
are composed of special wire covered
fabric with impregnated rubber.
LIMITATIONS:
porary and the damaged hoses should be
replaced as soon as possible. Inspect
after every flight.
PERSONNEL/TIME REQUIRED:
1 Soldier
15 Minutes
MATERIALS/TOOLS REQUIRED:
Glass Tape or Equivalent
PROCEDURAL STEPS:
1. Locate damaged area and remove panels
and/or other items as necessary to gain
access to the duct to be repaired.
to Figures 15-2 and 15-3 for locations of
flexible plastic ducts.
FLEXIBLE DUCT DAMAGE.
The flexible ducts
These repairs are tem-
When
Refer