As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-FLIGHT 3890 CREW REPORTED NR 1 HYDRAULIC ISOLATION VALVE CAUTION LIGHT ILLUMINATED IN FLIGHT AND PARTIAL LOSS OF HYDRAULIC FLUID. HYDRAULIC FLUID OBSERVED ON NR 2 ENGINE. MAINTENANCE SERVICED NR 1 AND NR 2 HYDRAULIC RESERVOIRS AND INSPECTED AREA. FLUID WAS FOUND TO BE GLYCOL. CREW GROUND RAN AIRCRAFT. NO LEAKS WERE NOTED. FLAP WELLS, WHEEL WELLS AND CENTER WING AREA WERE INSPECTED. NO LEAKS WERE NOTED. AIRCRAFT RETURNED TO SERVICE.