As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED A M/R TRANS CHIP LIGHT. INITIAL INSPECTION FOUND A DOT SIZED CHIP. THE AIRCRAFT WAS RUN UP AND AT 108 PERCENT FLIGHT IDLE A LOUD KNOCKING NOISE WAS HEARD FROM THE TRANSMISSION. REMOVAL AND SUBSEQUENT DISASSEMBLY FOUND A 1 INCH SECTION OF A TOOTH MISSING FROM THE RING GEAR. THIS TOOTH DAMAGED THE REST OF THE GEARS IN THE TRANSMISSION.