As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 2.5 HOURS OF FLIGHT TIME, AFTER SINGLE TOUCH AND GO AND DURING CLIMB OUT, THE PILOT NOTICED THE REAR DOOR WARNING LIGHT AND TRIED TO RE-ENGAGE PRIMARY DOOR LATCH. THIS RESULTED IN AN IN-FLIGHT SEPARATION AND SUBSEQUENT LOSS OF DOOR ASSEMBLY. (K)