As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER T/O AT AN ALTITUDE OF 350-400 FT, THE ENGINE TORQUE AND SPEEDS BEGAN TO FLUCTUATE FOLLOWED BY AN UNCOMMANDED POWER LOSS. THE PILOT DUMPED THE CONTENTS OF THE HOPPER AND RETURNED TO THE DEPARTURE STRIP WHERE HE LANDED SAFELY. TROUBLESHOOTING IS ON-GOING.