Service difficulty report · Bearing · Hughes 369D

Difficulty date
August 10, 2011
Submitted
September 9, 2011
Operation
General aviation
Make and model
Hughes 369D
Aircraft time
15,462 hours
Engine
Allsn 250C20B
Part
Bearing
Part number
369D25146
Condition
Spalled
Location
M/R Transmission
Component
Transmission
Component part number
369D25100
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

M/R TRANSMISSION CHIP LIGHT ILLUMINATED DURING FLIGHT. EVIDENCE OF METAL FOUND ON CHIP PLUGS. DURING TRANSMISSION DISASSEMBLY, REASON FOR METAL GENERATION WAS FOUND TO BE T/R O/P PINION ROLLER BEARING INNER RACE WHICH WAS CRACKED AND BADLY SPALLED.