As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, THE CREW NOTICED AN AIR STAIR DOOR ANNUNCIATOR ILLUMINATED. THE CREW PERFORMED AN AIR-TURN-BACK. THE DOOR WAS FOUND TO BE SECURE. AFTER MX CONSULTATION, THE ANNUNCIATOR WAS MEL`D AND THE AC RETURNED TO SERVICE. MX CLEANED AND INSPECTED THE DOOR SWITCHES. WITH NO FURTHER DISCREPANCIES, THE MEL WAS CLEARED AND THE AC WAS RETURNED TO SERVICE. (K)