As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 1626 - TAIL COMPARTMENT TEMP HIGHT LIGHT CAME ON DURING CLIMBING. THE LIGHT WENT OUT AFTER ABOUT 5 MINUTES. RETURNED AND LANDED ORD WITHOUT INCIDENT. REPLACED RIGHT SIDE PNEUMATIC SYSTEM AUGMENTATION VALVE. SYSTEM GROUND CHECKED, NORMAL OPERATION. (M)