TM 1-1520-238-23
6-278
6.63.
MAIN TRANSMISSION OIL FILTER SAFETY RELIEF VALVE
REMOVAL/INSTALLATION
6.63.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.63.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
Materials/Parts:
Packing
Petrolatum (item 138, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access panel L200 or R200 removed
1.32
Main transmission oil system drained
6.61
Main transmission filter bowl and element
removed
6.62
Main transmission filter bowl and element
removed
WARNING
FLIGHT SAFETY PART
The main transmission is a flight safety part. Failure to follow maintenance instructions may
result in serious injury or death of crewmembers and/or serious damage to the helicopter.
NOTE
This task is typical for either right or left oil filter safety relief valve.
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