As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 3147 - THE CREW REPORTED THAT AFTER TAKEOFF WHEN THE BLEED WAS OPENED, T6 WENT ABOVE 816C. THE AIRCRAFT RETURNED TO CLEVELAND WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LEFT PACK OVERHEAT SWITCH AND PERFORMED OPERATIONAL CHECKS IAW EMB-120 MM 21-61-00, AND 21-61-02. THE AIRCRAFT WAS RELEASED TO SERVICE. (X)