What was found
DURING FLIGHT 3654, YELLOW HYDRAULIC HIGH TEMPERATURE LIGHT ILLUMINATED IN FLIGHT. QRH FOLLOWED. AIR RETURN TO DTW. MAINTENANCE REMOVED AND REPLACED YELLOW ISOLATION VALVE. ALL CHECKS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING FLIGHT 3654, YELLOW HYDRAULIC HIGH TEMPERATURE LIGHT ILLUMINATED IN FLIGHT. QRH FOLLOWED. AIR RETURN TO DTW. MAINTENANCE REMOVED AND REPLACED YELLOW ISOLATION VALVE. ALL CHECKS GOOD.