Bell OH-58A Technical Manual page 249

BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR TRAINING
(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E.)
IN EITHER CASE, DAMAGES SHALL BE REPAIRED BY STANDARD
15-1. SCOPE. This chapter contains
BDAR procedures for the heat and vent,
bleed air, and defogging systems.
OH-58A/C has one of three types of heat
systems: bleed air, Figures 15-1 thru
15-3; combustion heater, Figure 15-4;
or shroud heater system, Figure 15-5.
15-2. GENERAL.
a. The three systems consists of air
mixing valve, air distribution ducts,
defroster nozzles, and control switches
to operate system.
The heat and vent system is pro-
b.
vided for crew comfort.
mission proficiency; however, the air-
craft capability is not contingent on
system operation. The aircraft is fully
flight capable without the system being
operable.
15-5. GENERAL INFORMATION:
to plastic ducts is repairable provided
the time required to gain access to the
damaged duct is feasible.
Hole or Crack in Duct, Rigid
OPTION 1:
Plastic.
Inspect after every flight.
LIMITATIONS:
CHAPTER 15
ENVIRONMENTAL CONTROL SYSTEM
AT THE DISCRETION OF THE COMMANDER.
PROCEDURES AS SOON AS PRACTICABLE.
Section I. INTRODUCTION
The
This aids the
Section II. RIGID PLASTIC VENTILATION DUCT
Some damage
c. The shroud heater system utilizes
a carbon monoxide (CO) indicator located
at the instrument panel in full view of
the pilot.
WARNING
If CO indicator is noted to be
dark, turn off heater, pull fire-
wall shut-off open vents, and
land as soon as practicable.
15-3. ASSESSMENT PROCEDURES.
Table 15-1.
15-4. REPAIR PROCEDURE INDEX.
Rigid Plastic Ducts. . . . . . 15-5
Flexible Ducts . . . . . . . . 15-6
Bleed Air Lines. . . . . . . . 15-7
PERSONNEL/TIME REQUIRED:
1 Soldier
1 Hour
MATERIALS/TOOLS REQUIRED:
Sheet Metal Patch, 0.016 inch
Thickness Minimum
Tape, Army Green or Aluminum
(item 50, Appx C)
TM 55-1520-228-BD
Refer to
PARA.
15-1