As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRE-DEPARTURE CREW REPORTED CO-PILOT EMERGENCY EXIT WINDOW WILL NOT OPEN. FOLLOWING GENERAL VISUAL INSPECTION, LINE MAINTENANCE NOTED SEAL CAKED WITH DEBRIS. SEAL MATING SURFACES CLEANED PER BOEING 767 AIRCRAFT MAINTENANCE MANUAL SUBTASK 56-11-11-424-030. CO-PILOT EMERGENCY EXIT WINDOW OPERATIONAL CHECK GOOD. NO ADDITIONAL FAULTS NOTED.