As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT ROTATION ACM OVERHEAT ANNUNCIATOR ILLUMINATED WITH MASTER CAUTION. REMOVED ECU OVERTEMP SWITCH AND REPLACED WITH A NEW SWITCH IAW AMM 21-51-01. REMOVED OTBD ACM EXHAUST DUCT AND REPLACED WITH A SERVICEABLE DUCT IAW AMM 21-51-00. REMOVED ACM EXHAUST ELBOW DUCT AND REPLACED WITH A SERVICEABLE DUCT IAW AMM 21-51-00. OPERATIONAL CHECKED.