As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FLT 194 - EN ROUTE SFO-BOS, DETECTED FORWARD ENTRY DOOR HANDLE MESSAGE. DOOR DISARMED. DETECTED AIR NOISE. PLACED HANDLE BACK WITH LOW DIFFERENTIAL, BUT WOULD NOT RE-ARM. RETURNED SFO AND LANDED WITHOUT FURTHER INCIDENT. RIGGED FORWARD ENTRY DOOR PER THE MM. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)