Service difficulty report · Bearing · Raythn B300RAYTHEON

Difficulty date
November 15, 2010
Submitted
November 16, 2010
Operation
General aviation
Aircraft
N363CA
Make and model
Raythn B300RAYTHEON
Aircraft serial
FL326
Aircraft time
2,514 hours
Engine
Pwa PT6A6
Engine time
2,514 hours
Part
Bearing
Part number
APC03600918BN
Condition
Disintegrated
Location
Starter Gen
Part time
522 hours
Component
Starter Gen · Lucas
Component part number
23085001
Stage of operation
CR
How discovered
O
Nature of condition
H
Precautionary procedure
O

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

What was found

(E81RINVESTIGATED REPORTED IN-FLIGHT LOSS OF LT ENG DC GENERATOR FUNCTION. INITIAL VISUAL INSP OF LT ENGINE STARTER GENERATOR SHOWED INTERNAL FAILURE, METALLIC DEBRIS IN ADJACENT ENGINE COMPARTMENT AREA. UPON DISASSEMBLY, FOUND ANTI-DRIVE END BRG HAD FAILED, CAUSING ARMATURE ASSY TO CONTACT ADJACENT STATOR WINDINGS AND BRUSH HOLDERS, ETC. DRIVE SHAFT FOUND NOT SHEARED, DRIVE END BRG WAS STILL ABLE TO ROTATE. IAW AVAILABLE RECORDS, NEW DRIVE END AND ANTI-DRIVE END BRGS INSTALLED AT O/H WERE PN APC03-6009-18BN BRGS MFG IN 2004.