What was found
AFTER T/O AND UPON RETRACTION OF GEAR, GEAR HANDLE WOULD NOT PHYSICALLY MOVE PAST CENTER FOR GEAR RETRACTION. A/C RETURNED TO STL AND LANDED W/O FURTHER INCIDENT. MX TROUBLESHOT AND REPLACED THE LOCKING SOLENOID IN THE GEAR HANDLE. ACFT THEN WENT ON MX FERRY TO RETURN TO PHX FOR EXPIRED 4 DAY. PROBLEM REPEATED AND A/C TURNED BACK TO STL AGAIN. LANDED W/O FURTHER INCIDENT. A/C IS STILL OUT OF SERVICE. ONLY OTHER HISTORY ON GEAR RETRACTION SYSTEM WAS ON 29AUG FOR ALL THREE RED AND GREEN GEAR LIGHTS RECEIVED UPON EXTENSION ALONG WITH AURAL "TOO LOW GEAR". MX CLEANED SENSOR'S ON THAT PARTICULAR INCIDENT.