As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)REDUCTION GEARBOX METAL CONTAMINATION. #15 BEARING HAD A LARGE SPALL OVER 60 DEGREES OF THE OUTER RACE. SEVERAL STEEL COMPONENTS WERE HEAVILY MAGNETISED AND #18 AND #19 BEARINGS SHOWING SIGNS OF ELECT RICAL PITTING LEADING TO BELIEVE THAT LIGHTNING STRIKE IS LIKELY THE CAUSE OF THE BEARING FAILURE.