As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1392 - EN ROUTE SAT-ORD, FORTY-FIVE MINUTES INTO FLIGHT NR 2 HYDRAULIC SYSTEM FAILED. DIVERTED DFW AND LANDED WITHOUT FURTHER INCIDENT. REPLACED NR 2 SIDE HYDRAULIC SYSTEM RETURN FILTER AND SEALS. NO LEAKS NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)