As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEM - FLT 3645 - THE CREW REPORTED THAT THE GEAR WOULD NOT LOCK IN THE UP POSITION. THE AIRCRAFT RETURNED TO MEM WHERE IT LANDED WITHOUT INCIDENT. THE LANDING GEAR WAS PLACED ON MEL 32-31-03, AND WAS APPROVED FOR RETURN TO SERVICE. THE AIRCRAFT RETURNED TO IAH WHERE MAINTENANCE REMOVED AND REPLACED THE LEFT MLG UPLOCK BOX PROXIMITY SWITCH IAW ATR42-500 MM 32-61-00, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)