As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT #3622 TO SDF YELLOW HYDRAULIC HI TEMP LIGHT ILLUMINATED. QHR WITH ENGINE #2 PUMP OFF HIGH TEMP WENT OUT. A/C DIVERTED TO CVG. MAINTENANCE SWAPPED YELLOW AND GREEN TEMP SWITCHES IAW AMM 29-33-11. PN HE83273-1 REMOVED AND REPLACED YELLOW ISOLATION VALVE PN HTE9531-3, SN/OFF FRTR010AW SN/ON 988VB113 IAW AMM 29-10-14 OPS AND LEAK CHECK GOOD.