As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE CUSTOMER REPORTED A TORQUE POWER ROLLBACK RT AFTER TAKEOFF. AFTER EVALUATION, CREW ELECTED TO CONTINUE THEIR MISSION AND ONCE LEVELED, THE TORQUE STABILIZED. AN UNEVENTFUL LANDING WAS PERFORMED. THE CREW DID NOT HAVE TO USE ANY EMERGENCY PROCEDURE. THE ENGINE WAS SHUTDOWN NORMALLY ONCE AT THE HANGAR.