As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORT: DURING FLIGHT WAS PRESENTED ENTRY DOORS LIGHT ILLUMINATED STEADY AND EICAS MSG. RT AFT ENTRY DOOR DISPLAYED STEADY. LOCK PIN ENGAGED. FLIGHT RETURNED. AFT ENTRY SERVICE DOOR LATCH PIN WAS FOUND BENT AND IT WAS REPLACED IAW AMM 521115 PAGE 401 TO 406 WITH SATISFACTORY RESULTS.