What was found
PILOT REPORTED THE UPPER CABIN DOOR OPENED IN FLIGHT. INSPECTED THE UPPER CABIN DOOR LATCH WITH NO DEFECTS FOUND IAW MM CHAPTER 52.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT REPORTED THE UPPER CABIN DOOR OPENED IN FLIGHT. INSPECTED THE UPPER CABIN DOOR LATCH WITH NO DEFECTS FOUND IAW MM CHAPTER 52.