As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON TEARDOWN OF THE ENGINE FOR AN UNRELATED ISSUE, IT WAS DISCOVERED THE COMBUSTION LINER WAS DISTORTED DUE TO BLOCKED COOLING HOLES. SUSPECT PLASMA COATING OVERSPRAY DURING OVERHAUL. INVESTIGATION IS ONGOING. SERVICE BULLETIN IS PENDING.