As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR 1 ARMS, BUT WILL NOT INDICATE ARMED ON COCKPIT. [SUP 05-08-07] FAULT TRACED TO OUT OF ADJUSTMENT PROXIMITY SWITCH. MORE SPECIFICALLY, A LOOSE LOCK WASHER ON THE PROXIMITY TARGET. REPLACED LOCK WASHER AND READJUSTED PROXIMITY SWITCH TO PROPER CLEARANCE.