As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF ALL GEAR LIGHTS WENT OUT, THEN LT GEAR INDICATION RED AND GREEN ON BOTH PANELS. AIR NOISE CONFIRMED PROBABLE GEAR DOWN. PERFORMED OPERATIONAL CHECK OF LANDING GEAR SEVERAL TIMES IAW ATR 72 JIC 32-30-00 FUT. NO DEFECTS NOTED AT THIS TIME.