As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3655, BOTH MAIN GEAR INTRANSIT LIGHT FAILED TO EXTINGUISH AFTER GEAR SELECTED UP. CREW FAILED TO ENTER. AIR RETURN TO DTW. MAINTENANCE FOUND BOTH UPLOCKS CONTAMINATED WITH DIRT AND SNOW. CLEANED AND LUBED, SWUNG GEAR IAW 32-30-00. ALL CHECKS GOOD AT THIS TIME.