BHT-412-MM-2
5-00-00
15 DEC 2015 Rev. 23 Page 163
Export Classification C, ECCN EAR99
c. Inspect shaft and flange for evidence of wear, nicks,
dents, enlarged holes, and cracks.
d. Inspect bearing for grease leakage.
e. Inspect bearing in hanger for smoothness of rotation
and binding by manually rotating bearing.
4. Lubricate hanger assembly.
COUPLING ASSEMBLY (412-040-601-101/-109)
1. Visually examine exterior surfaces of coupling assembly
and adjacent area surfaces for evidence of grease leakage.
Chapter 65 2. Remove coupling assembly 412-040-601-101/-109 from
helicopter.
Refer to the BHT-412-CR&O for disassembly,
cleaning assembly, inspection procedures, and wear
and damage limits.
BHT-412-CR&O 3. Clean external surfaces of coupling assembly.
4. Visually inspect coupling assembly, as follows:
CAUSE OF ANY DISCOLORATION SHALL BE
DETERMINED AND CORRECTED PRIOR TO
NEXT FLIGHT.
a. Inspect coupling TEMP-PLATE overtemperature
indicator and exterior surfaces for discoloration and overheat
condition. A change in color of TEMP-PLATES (from white to
black) indicates a possible overheat condition and possible
component degradation. The cause of indicator or exterior
surface discoloration shall be determined and corrected prior to
continued operation.
5-31. EACH 2500 HOURS OF TAIL ROTOR DRIVE SYSTEM OPERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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