As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GEAR RETRACTION, THE GEAR WARNING HORN SOUNDED AND WAS MUTED. WHEN FLAPS MOVED TO ZERO, HORN SOUNDED AGAIN AND WAS MUTED. ACFT RETURNED TO DEPARTURE. EXTENTION AND LANDING WAS NORMAL. COMPLIED WITH FUNCTION CHECK OF WARNING HORN. COULD NOT DUPLICATE. R & R PSEU AS PRECAUTION IAW AMM 32-61-50. OPS CHECKED GOOD. READ WIRES AT PSEU 3261-C36, B52, AND C65. NO DEFECTS NOTED.