As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPROACH INTO BTV, THE LANDING GEAR WOULD NOT EXTEND NORMALLY. ALTERNATE GEAR EXTENSION PERFORMED. MAINTENANCE TROUBLESHOT SYSTEM. FOUND THE LANDING GEAR SELECTOR VALVE AT FAULT. REMOVED AND REPLACED VALVE IAW DHC MANUAL, SYSTEM OPERATIONALLY CHECKED GOOD. A/C RETURNED TO SERVICE. (M)