As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS LEFT PROP HEAT FAILS INTERMITTENTLY INFLIGHT. RETURNED TO PDX. MAINTENANCE FOUND THE PROP HAD BEEN STRUCK BY LIGHTNING. REMOVED AND REPLACED LEFT BULKHEAD ASSEMBLY, DID NOT FIX PROBLEM. P/N ON 784784-1, S/N ON 960443, S/N OFF 9202318. REMOVED AND REPLACED ALL PROP BLADES IAW MM 61-13-04.