As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT REAR (R3) DOOR EICAS MSG FLICKERED ON & OFF AFTER TAKEOFF. DOOR HANDLE MOVED UP APPROX. 2-3 INCHES. AIRCRAFT REMAINED PRESSURIZED. NO REPORTED SOUND OF AIR LEAK. INSPECTED: FOUND OVERCENTER LOW. READJUSTED IAW AMM 52-11. NOW OP'S NORMAL AND OK FOR SERVICE.