As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SUMP CHIP INDICATION DURING GROUND RUN PRIOR TO FLIGHT. METAL CONTAMINATION OF INTERNAL FILTER AND SUMP CHIP PLUG.TRANSMISSION REMOVED FROM SERVICE, TEARDOWN CARRIED OUT. HYDRAULIC QUILL DUPLEX BEARING IDENTIFIED AS SOURCE OF METAL GENERATION.