As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A FLIGHT TEST, AFTER ANNUAL CHECK, THE NR 1 ENGINE EXPERIENCED A LOSS OF TORQUE. NO OTHER DETAILS ARE AVAILABLE ON THE CIRCUMSTANCES. THE OPERATOR IS CURRENTLY DOWNLOADING ENGINE AND AIRFRAME DATA, TROUBLESHOOTING IS ON-GOING.