As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA-ROC FLIGHT#3785. CREW REPORTED LOSS OF #1 HYDRAULIC CONTENTS. RAN LESS THEN ONE MINUTE WITH CONTENTS LOST. CREW DECLARED AN EMERGENCY. FLIGHT LANDED IN BGM WITHOUT INCIDENT. MAINTENANCE REPLACED HYDRAULIC LINE FOR FLIGHT SPOILER UNLOADING VALVE FOR SPOILER CLUTCH IN ACCORDANCE WITH DEHAVILLAND DASH 8 MAINTENANCE MANUAL 20-06-03. NO LEAKS WERE NOTED. AIRCRAFT RETURNED TO SERVICE.