As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DSM - EN ROUTE, AIRCRAFT LOST HYDRAULIC PRESSURE. USED EMERGENCY LANDING GEAR PUMP TO LOWER GEAR. UNEVENTFUL LANDING. MECHANIC FOUND HYDRAULIC LINE TO THE PUMP CHECK VALVE LOOSE. REMOVED THE LINE, CLEANED FLARE AND SEAT THEN REINSTALLED. LEAK CHECK SATISFACTORY.