As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER DOOR MASTER CAUTION AND AURAL `DOOR` CAME ON AFTER TAKEOFF AT APPROXIMATELY 500 AGL. COMPLIED WITH QRH AND RETURNED TO LAND. INTERROGATED PSEU, FOUND CODES D116, D117 AND D113. ALL INDICATIONS NORMAL. ALL ALIGNMENT MARKS NORMAL. NO FAULTS NOTED. (M)