As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE CLIMBING AWAY FROM A WATER SCOOP, THE CREW NOTICED THAT THE RT ENGINE WAS BECOMING UNCONTROLLABLE, ROUGH RUNNING AND LOSING POWER. THE CREW DROPPED THE LOAD AND SHUTDOWN THE RT ENGINE AND FEATHERED THE PROPELLER. THE AIRCRAFT MADE THE SINGLE ENGINE LANDING WITHOUT INCIDENT, AND THE AIRCRAFT RETURNED TO THE HANGER FOR INVESTIGATION.