As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) LH ENGINE WAS SHUT DOWN AND FEATHERED FOR TRAINING PURPOSES - THE FEATHERED ENGINE CONTINUED TO ROTATE AT APPROXIMATELY 100RPM - INVESTIGATION FOUND THE MAIN OIL FILTER HEAVILY CONTAMINATED WITH METAL - CAUSED BY PLANET GEAR (PNO 3108207-01) BEARING AND STEEL SLEEVE SEIZING