As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE LEFT ENGINE BEGAN TO VIBRATE, THEN OIL PRESSURE BEGAN TO DROP AND CONTINUED DROPPING INTO THE RED. INITIAL INSPECTION FOUND MULTIPLE POINTS OF ENGINE CASE PENETRATION. THE NUMBER 6 CYLINDER SHOWED SIGNS OF DETONATION WITH DEBRIS IN THE LOWER SPARKPLUG. FURTHER DETAILS WILL BE SUPPLIED UPON FURTHER INVESTIGATION.