As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE L2 DOOR HANDLE ON THE EXTERIOR, UNLOCKED AFTER TAKEOFF. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED. REPLACED THE L2 DOOR EXTERIOR DOOR HANDLE SHAFT ASSEMBLY IAW AMM 52-13-11. OPS CHECKED GOOD.