As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CO-PILOT DOOR WINDOW DEPARTED IN FLIGHT AT APPROX 150 KNTS. ACFT WAS SLOWED AND RETURNED TO FIELD WITHOUT INCIDENT. DOOR AND ACFT WERE NOT DAMAGED. WINDOW WAS NOT FOUND. DOOR WAS REMOVED, WIDOW SEAL AREA WAS INSPECTED AND REPAIRED TO PROPER THICKNESS FOR SEAL FIT. NEW SEAL, AND NEW WINDOW, WERE INSTALLED.