As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BANG FOLLOWED BY METALIC GRINDING NOISE AS REPORTED BY PILOT. GEAR BOX OIL PRESS FUNCTUATION NOTICED (NR 1 ENG) AND ZERO HORSEPOWER REGARDLESS OF POWER LEVER POSITION, ENGINE STILL RUNNING. ENGINE FOUND TO BE DECOUPLED UPON GROUND INSP.