As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) GLOBAL 5000 VISION REPORTED A R ENGINE ROLL BACK IN DESCENT WITH A SUBSEQUENT CYAN ENG SYNC LIMITED EICAS MESSAGE. THE CREW SWITCHED FROM AT1 TO AT2 AND NORMAL ENGINE OPERATION WAS RESTORED AND NO FURTHER DISCREPANCIES WERE NOTED. TROUBLESHOOTING ONGOING.