As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT EXTEND WHEN SELECTED DOWN INBOUND TO MCW, AIR RETURN TO MSP. MAINTENANCE REMOVED AND REPLACED LANDING GEAR CONTROL VALVE PN HP848430-721 SN/ON 0011 SN/OFF 2054 IAW SF340 AMM 32-31-15, OPS CHECK GOOD. CYCLED GEAR 15 TIMES IN HANGER LEAK CHECK GOOD.