As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3142 - DTW-CLE - AFTER COMPLETION OF PARKING CHECKLIST GEAR HANDLE RETRACTED ON ITS OWN. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR CONTROL HANDLE IAW EMB-120 MM 32-31-03. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (Z)