As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R1 EXTERIOR DOOR HANDLE CAME LOOSE AFTER TAKEOFF, REMAINED VERTICAL POSITION. GROUNDED - YES. DIVERSION TIME: 20 MINUTES - ACCOMPLISHED GVI TO R1 DOOR FROM OUTSIDE, OPENED AND CLOSED DOOR SEVERAL TIMES NO DEFECT NOTED REF B737-900 AMM 52-11-00-860-801.