As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROC - EN ROUTE - THE LANDING GEAR WOULD NOT EXTEND UNDER NORMAL CONDITIONS. CREW PERFORMED AN ALTERNATE EXTENSION AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE LANDING GEAR SELECTOR VALVE LEAKING. REMOVED AND REPLACED VALVE IAW DHC MM. GEAR RETRACTION TEST PROVED SATISFACTORY. AIRCRAFT RETURNED TO SERVICE. ACTC: 21,841. (X)