What was found
FLIGHT CREW REPORTED THAT ALL THREE LANDING GEARS UNLOCKED & PARTIALLY EXTENDED DURING FLIGHT WITH GEAR SELECTOR IN THE UP POSITION. MX FOUND DEFECTIVE LG HANDLE & SWITCH ASSEMBLY, SN 445. REPLACED WITH SERVICEABLE UNIT, SN 519, 8130-3 FROM M7 AEROSPACE. ON SUBSEQUENT FLIGHT, NEW GEAR HANDLE STUCK IN THE DOWN POSITION. MX FOUND HANDLE DOWN LOCK MECHANISM DEFECTIVE. SECOND NEW HANDLE ASSEMBLY, SN 276, WAS INSTALLED & NO FURTHER ISSUES WERE NOTED.