As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH LANDING GEAR HANDLE IN UP POSITION, WARNING HORN SOUNDS CONTINUOUSLY AND ALL THREE RED GEAR UNSAFE LIGHTS ARE ILLUMINATED. RESEATED LANDING GEAR ELECTRONIC MODULE; PERFORMED OPERATIONAL TEST OF LANDING GEAR ELECTRONIC MODULE IAW B-727 M/M 32-09-121, CYCLE LANDING GEAR HANDLE SEVERAL TIMES, SYSTEM CHECKED NORMAL.