As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 CYLINDER HAD INTAKE AND EXHAUST ROCKER ARM ASSEMBLIES SWITCHED. NR 2 EXHAUST VALVE MIGHT HAVE STUCK DUE TO NO LUBRICATION OR COOLING FROM THE DRILLED PASSAGEWAY BECAUSE THE EXHAUST ROCKER ARM WAS IN THE INTAKE VALVE POSITION. INTAKE ROCKER FAILED.