As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALB-DCA FLIGHT 3922 CREW REPORTED HYDRAULIC CONTENTS ON NR 1 SYSTEM BELOW 1.5 QUARTS AND DROPPING. FLIGHT DIVERTED TO MDT FOR REPAIRS. MAINTENANCE FOUND A BROKEN LINE AT THE LANDING GEAR SELECTOR VALVE. LINE WAS REPLACED. FUNCTION AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.