As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB WITH TAKEOFF POWER, EGT WENT TO 652 DEGREES FOR 5 SECONDS WITH POWER REDUCTION, EGT RETURNED TO NORMAL. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED BLOWN DUCT AND PRSOV. PERFORMED LEAK CHECK AND FULL ENGINE RUN-UP. AIRCRAFT OK FOR SERVICE.