TM 1-1520-238-23
1-85
1.28.
ENGINE NOSE GEARBOX SERVICING
1.28.1. Description
This task covers:
Servicing.
1.28.2. 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:
TB 55-9150-200-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Engine nose gearbox fairing LN6 or RN6
removed
1.28.3. Servicing
NOTE
The level in the sight indicator may
appear high immediately after shut-
down. Wait 15 minutes after shutdown
for NGB oil level to stabilize.
Add oil to NGB only if the level in the
sight indicator is at or below the quar-
ter level on the sight indicator (one
quarter level is 0.18 inch above the
bottom of sight indicator).
Refer to TB 55-9150-200-24 for con-
version of oils MIL-L-23699 and
MIL-L-7808. Failure to perform the re-
quired checks and services can result
in contamination of the affected oil
system.
This task is typical for left and/or right
engine nose gearbox.
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M04-1604-1
M04-1604-2
TYPICAL LEFT AND RIGHT
