As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE BOTH ENGINES HAD A 10-15 PERCENT ROLL BACK FOR 2-3 SEC. BEFORE RECOVERING SET POWER ON 2 SEPARATE OCCASIONS. THE FLIGHT LANDED UNEVENTFULLY. GROUND RUNS COULD NOT REPLICATE THE PROBLEM AND TROUBLESHOOTING IS ON-GOING.