As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE RPM ROLLED BACK TO 40 PERCENT AFTER DEPARTURE. UNEVENTFUL LANDING ACCOMPLISHED. FOD DAMAGE NOTED. ENGINE REPLACED WITH SERVICEABLE UNIT. SUBMITTER RECOMMENDATION: AVOID FOD. SUSPECTED ICE INGESTION, NO FOREIGN MATERIAL WAS FOUND ON TEAR-DOWN. OPER CONTROL NR 4-12-95900WA.