As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DEPARTURE, AFTER SELECTING CRUISE DETENT, THE CREW NOTICED SOME N1 OSCILLATION FOLLOWED BY A LOUD SURGE SOUND. NO OTHER EVENTS FOR REMAINING OF FLIGHT. VISUAL CHECK OF THE ENGINE SHOWED NOTHING ABNORMAL. DOWNLOAD FORWARDED TO MFG FIRST FOR EVALUATION.