SECTION III. BATTLE-DAMAGE REPAIRS
indicated in the applicable aircraft manual may be
deferred. Unscheduled maintenance, such as the repair
of systems and subsystems which are not critical to
mission accomplishment, may be deferred if safety of
flight is not significantly degraded. The commander
may defer combat maintenance and battle-damage
repair, even if doing so places operational limitations on
GENERAL The purpose of pneudraulic system
BDR is to restore serviceability to only those systems
required to perform the mission. The type mission to be
flown will determine the system required. Pneudraulic
system damage will normally be reported by the pilot or
be self-evident. However, a full assessment of all
damage is essential before repair decisions are made.
attempted when down time will not be increased. These
procedures are intended to provide guidance and
suggest approaches to making essential repairs in a
Expedient Repairs. Standard repair methods
should be used if facilities, equipment, materials, and
experienced personnel are available. In most cases,
nonstandard repair methods. Some of the expedient
repairs are temporary, while others are permanent.
However, it should be remembered that the objective of
BDR is to return the aircraft to the flight line by the
speediest means possible so that it is capable of
Non-detailed Instructions. Uncertainties in the
battle-damage repair environment make it impossible to
give specific repair procedures for all situations
involving pneudraulic system damage. The best repair
method will depend on the availability of facilities,
spares, and the operational or tactical environment
Ultimately, the best method will depend on the
experience and ingenuity of the BDR technicians. The
repair techniques discussed in this manual do not
include detailed procedures. Therefore, the use of
sound judgment and experience in the selection and
application of repairs is of paramount importance.
Although these repairs will restore essential systems to
a serviceable condition, they are intended to serve as a
checklist of ideas. The repairs are neither exhaustive
COMPONENT DAMAGE. Component damage
replacement. Serviceable items will be obtained
through normal sources or cannibalization. However,
internal repairs will be attempted when replacement
parts are not available and technical ability is
accessible. Nonessential components will be isolated at
the component or downstream past the damaged area.
Leaving existing damaged tubing installed and routing a
replacement hose from the first undamaged "B" nut, can
save time. The procedure is permissible providing
existing tubing does not interfere with other operations.
Secure replacement hose where it will not be damage
during system operation.
Substitute or repair hoses must meet
PNEUDRAULIC SYSTEM . When only one
pressure source is required, other damaged systems
maybe isolated. The type mission required will
determine what systems can be eliminated. The
technician and assessor will evaluate these situations.
Take care to prevent hydraulic liquid
locks whenever a component has
one system disconnected or isolated.
A bypass hose will have to be
installed to direct pressure from inlet
port to outlet port. In some cases
ports will have to be left open.
TECHNIQUES. Of all battle damage incurred by
aircraft pneudraulic systems, the most probable will be
tubing and hose installation damage. BDR to hose and
tubing installation can be accomplished in many
different ways. When repairs must be made, the most
important items are system pressures, tools and repair
materials. Most aircraft have a combination of both
tubing and hose installations of both AN (flared), MS
Replacement with original equipment is desirable but
not essential, providing materials are available and
down time will not be increased.
Manufacture. Manufacture as per sample or
template and replace damaged assembly. This can be
accomplished using AN flared assemblies with MS
flareless installation or MS flareless assemblies with AN
flared type installation providing appropriate AN to MS
unions are available.