TM 1-1520-238-23
1-72
1.24.
ENGINE OIL SYSTEM DRAINING AND SERVICING
1.24.1. Description
This task covers:
Draining. Servicing.
1.24.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
1-quart funnel (item 140, App H)
Chemical protective gloves (item 154, App H)
Lube drain kit (item 192, App H)
14-quart utility pail (item 222, App H)
Materials/Parts:
Packing
Lubricating oil (item 118, App F) or
Lubricating oil (item 119, App F)
Personnel Required:
67R
Attack Helicopter Repairer
References:
TM 55-2840-248-23
TB 55-9150-200-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors LN1 and/or RN1 opened;
doors LN2 and/or RN2 removed
1.24.3. Draining
CAUTION
Allow engine to cool at least 30 min-
utes before servicing oil system. This
will allow oil to drain into engine reser-
voir and prevent possible overservic-
ing of engine.
Do not mix lubricating oil (item 118,
App F) with lubricating oil (item 119,
App F) except in an emergency. The
system must be drained and refilled
with the proper oil as soon as possible
if it becomes necessary to mix oils.
NOTE
Refer to TB 55-9150-200-24 for conver-
sion of oils MIL-L-23699 and MIL-L-7808.
Failure to perform the required checks
and services can result in contamination
of the affected oil system.
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M04-1623-2
