As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - CREW REPORTED A STEADY DIMINISHING NR 1 HYD FLUID LEVEL WITH CONCERN OF LOSS OF HYD SYSTEM UPON ARRIVAL TO IAH; SOCC DECISION TO DIVERT FLIGHT INTO BNA FOR BRIEF HYD INSPECTION AND SERVICING. EMERGENCY NOT DECLARED. MAINTENANCE PERFORMED A GVI ON THE NR 1 HYD SYSTEM WITH THE ELECTRIC PUMP, NO LEAKS NOTED AND WAS RELEASED TO SERVICE.