As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 1 CYLINDER SPARK PLUGS (2 OFF) DAMAGED BY FOD. CYLINDER AND PISTON ALSO CONTAINED SMALL DENTS. FOD WAS FOUND TO BE A MISSING BLANKING PLUG FROM THE CYLINDER PRIMER POSITION. THE PLUG WAS FINALLY LOCATED IN THE NR 2 CYLINDER INDUCTION TUBE.