As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 372 - YELLOW HYDRAULIC HI-TEMP WARNING LIGHT CAME ON, 25 MINUTES INTO FLIGHT, LIGHT WENT OUT APPROXIMATELY 10 MINUTES LATER. REMOVED AND REPLACED LEFT ENGINE HYDRAULIC PUMP ISO VALVE. OPS AND LEAK CHECK GOOD. S/N OFF 785VB137. S/N ON 1185VB154.