As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF SINGLE CHIME AURAL WARNING CHIMED CONTINUED WITH GEAR DOWN BUT STOPPED WHEN REACHING THE GATE. UNSCHEDULED LANDING. REPLACED AURAL WARNING UNIT IAW MM 315302, OPS CHECKS GOOD ON GROUND. (P/N 80055711) (S/N 0042) ON, (S/N 0086) OFF.