As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE ENGINE REPORTEDLY LOST POWER DURING TAKEOFF WITH SUBSEQUENT DAMAGE TO THE AIRCRAFT. THE ENGINE HAD BEEN CONVERTED FROM A PT6A-15AG TO A PT6A-34AG UNDER AIRFORCE TURBINE SERVICES STC SE7677SW. P&WC WILL MONITOR INVESTIGATION OF THE INCIDENT AND WILL ADVISE OF ROOT CAUSE ONCE DETERMINED.