As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: THE HANDLE ON THE RIGHT AFT SERVICE DOOR DOES NOT STAY IN THE FULLY CLOSED AND LOCKED POSITION. MOVES TOWARDS OPEN POSITION. ALL COCKPIT INDICATIONS NORMAL. ADJUSTED/RIGGED R4 DOOR FORWARD AND AFT LOWER LATCH RECEIVER'S PER AMM 52-41-00.