Service difficulty report · Bearing · Beech 300BEECH

Difficulty date
March 3, 2009
Submitted
August 14, 2009
Operation
General aviation
Aircraft
N80BZ
Make and model
Beech 300BEECH
Aircraft serial
FA117
Engine
Pwa PT6A60
Propeller
Hartzl HCB4MP3
Part
Bearing
Condition
Failed
Location
Starter Gen
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

FROM MFG: AN ELECTRICAL CURRENT FROM THE STARTER GEN OUT PUT SHAFT DISCHARGED INTO THE ENG ACCESSORY DRIVETRAIN CAUSE AN IN-FLIGHT SHUTDOWN. THE ELECTRICAL DISCHARGE PITTED THE DRIVE GEARS AND NR 1 BRG. THE PITTING OF THE BEARING LEF TO FATIGUE FAILURE OF THE BRG AND SUBSEUENT ENGINE FAILURE. (K)