As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT DOOR POPPED OPEN & WON'T CLOSE. DIVERTED. LANDING UNEVENTFUL.COCKPIT DOOR WAS PREVIOUSLY REMOVED. REMOVED UPPER AND LOWER HINGES FROM THE DOOR. CONTOURED THE HINGES TO ORIGINAL, HFEC COMPLIED WITH NO CRACKS NOTED. REINSTALLED UPPER AND LOWER HINGES, AND INSTALLED THE DOOR IAW AMM 52-51-01-400-801-A. OPS CHECKED GOOD IAW E/C ETD2018-170-000059. RETURNED TO SERVICE.