As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LOSS OF POWER, FOLLOWED BY PRESSURIZATION LOSS. DURING CLIMB, ENGINE KEPT RUNNING WELL, BUT POWER WAS LIMITED TO 19" HG INSTEAD OF 35" HG- PRIOR TO EVENT. DISCOVERED TURBINE ON RT TURBOCHARGER HAD SEIZED. ENGINE HAS BEEN OPERATED AND MAINTAINED IAW MFG INSTRUCTIONS. UNABLE TO DETERMINE ANY EXTERNAL CAUSE OF FAILURE.