What was found
FLIGHT 5311 - HYD SYS NR 3B OVERHEAT CAUTION MESSAGE ILLUMINATED IN FLIGHT. AIRCRAFT RETURNED BACK TO CVG AND LANDED SAFELY. REMOVED AND REPLACED NR 3 HYD RESERVOIR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5311 - HYD SYS NR 3B OVERHEAT CAUTION MESSAGE ILLUMINATED IN FLIGHT. AIRCRAFT RETURNED BACK TO CVG AND LANDED SAFELY. REMOVED AND REPLACED NR 3 HYD RESERVOIR.