As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DRIVE END HOUSING FAILED AFTER 150 HOURS TIS ON THIS GEAR DRIVE UNIT. THIS COULD HAVE CAUSED ALTERNATOR TO FAIL AND SEVERELY DAMAGE ENGINE. HAVE SEEN SAME PROBLEM WITH OTHER UNITS OF THIS SAME MODEL. CRACKS ORIGINATED IN SHARP CORNERS OF SUPPORT WEBS.