As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPLYING TAKEOFF POWER, TAIL COMPARTMENT HIGH TEMPERATURE LIGHT ILLUMINATED. ACFT RETURNED TO THE GATE. AT GATE WITH APU ON AND LEFT PACK ON LIGHT CAME ON AGAIN. LIGHT WENT OUT WHEN LEFT PACK WAS SECURED. REPLACED BOTH LEFT AND RIGHT TAIL COMPARTMENT OVERHEAT SENSORS.