Bell OH-58 C, Technical Manual

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TM 55-1520-228-BD
GENERAL INFORMATION
b. BDAR techniques are not limited to
simple restoration of minimum functional
combat capability.
If full functional
capability can be restored expediently
with a limited expenditure of time and
assets, it will be accomplished.
c. Some of the special techniques in
this manual, if applied, may result in
shortened life or in further damage to
major components of the helicopter. The
commander must decide whether the risk
of having one less helicopter available
for combat outweighs the risk of
applying the potentially destructive
expedient repair technique.
Each tech-
nique gives appropriate warnings,
cautions, and lists systems limitations
caused by this action.
1-4. DEFINITIONS.
a. Battlefield Damage.
Any incident
such as combat damage, random failures,
operator errors, accidents, and wear-out
failures which occur on the battlefield
and which prevent the helicopter from
accomplishing its mission.
b. Repair or Fix. Any expedient
action that returns a damaged part or
assembly to a full or an acceptably
degraded operating condition, including:
(1) Short cuts in parts removal or
installation.
(2) Installation of components
from other equipment that can be
modified to fit or interchange with
components on the damaged equipment.
(3) Repair using parts that serve
a noncritical function elsewhere on
the same equipment for the purpose of
restoring a critical function.
(4) Bypassing of noncritical com-
ponents in order to restore basic func-
tional capability.
(5) Expeditious cannibalization
procedures.
(6) Fabrication of parts from kits
or readily available materials.
(7) Jury-rigging.
(8) Use of substitute materials.
c. Damage Assessment. A procedure to
rapidly determine what is damaged,
whether it is repairable, what assets
are required to make the repair, who can
do the repair (e.g., crew, maintenance
team or maintenance support team), and
where the repair should be made. The
assessment procedure includes the
following steps:
(1) Determine if the repair can be
deferred, or if it must be done.
(2) Isolate the damaged areas and
components.
(3) Determine which components
must be fixed.
(4) Prescribe fixes.
(5) Determine if parts or com-
ponents, materials, and tools are
available.
(6) Estimate the manpower and
skill required.
(7) Estimate the total time (clock
hours) required to make the repair.
(8) Establish the priority of the
fixes.
(9) Decide where the fix shall be
performed.
(10) Decide if recovery or evacua-
tion is necessary and to what location.
d. Fully Mission Capable (FMC). The
helicopter can perform all its combat
missions. To be FMC, the helicopter must
be complete and fully operable with no
faults listed in the aircraft inspection
and maintenance record as prescribed in
DA PAM 738-751.
1-2