As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER ONE HOUR AT CRUSE FLIGHT, DOOR 2L ARM INDICATIONS ON FLIGHT DECK DOOR/OXY PAGE INDICATE DISARMED. FLIGHT ATTENDANT PANEL IN FORWARD GALLEY HAS A FLASHING DISARMED INDICATION. DOOR 2L ARM LEVER IS IN THE ARMED POSITION. ALL INDICATIONS WERE NORMAL PRIOR TO CRUISE FLIGHT. MAINTENANCE REPLACED L2 DOOR PROX SWITCH PER AMM 52-73-11-000-00 2A/400-002-A PREFORMED OPERATIONAL TEST AMM 52-73-00-710-001-A.