What was found
BDL - FLT 3387 - INBOUND BDL, CREW REPORTED LANDING GEAR WOULD NOT EXTEND. THE CREW THEN USED ALTERNATE GEAR EXTENSION METHOD. AIRCRAFT LANDED WITHOUT INCIDENT. BDL MAINTENANCE ISSUED FERRY PERMIT TO BTV, AIRCRAFT FERRIED; MAINTENANCE FOUND FAULTY MAIN LANDING GEAR SELECTOR VALVE. REMOVED AND REPLACED VALVE WITH SERVICEABLE UNIT. PERFORMED GEAR RETRACTION/EXTENSION, CHECKED GOOD AND RETURNED AIRCRAFT TO SERVICE. ACFT TT 16,032.6 HOURS. ACFT CYCLES 19,157. (X)