As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS LOWER WINDOW INTERMITTENTLY ARCING/SPARKING IN FLIGHT. APPEARS TO BE COMING FROM ELECTRICAL STRIP IN WINDOW BURN MARKS PRESENT.(<P>REMOVED AND REPLACED 1L WINDOW IAW B767 AMM 56-11-01-004-039 AND B767 AMM 56-11-01-404-017. OPS CHECK GOOD. WINDOW PN OFF 141T4800-13 SN OFF H4405 PN ON 141T4801-49 SN 3118716</P><P>NOTE- PER MCC REQUEST ALSO REPLACED L1 WINDOW HEAT CONTROL UNIT OPS CHECK OK (PN 624066-5 SN OFF 0190-1295 SN ON 083C-450)</P>)