As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED DURING CLIMB AND ROTATION E1 POWER RAPIDLY FLUCTUATED BY 1-2% N1 AND ITT BY 20-30 DEGREES. INTERMITTANT MILD PULLING WAS FELT FROM THE ENGINE. NO EICAS MESSAGES. WHEN LEVELED OFF ENGINE STABILIZED AT LOWER THRUST SET. REPORTED SEEMED TO BE A HIGH THRUST THING. NO FURTHER PROBLEMS NOTED. MAINTENANCE INSPECTED AND REPLACED FADEC 1B AND ENGINE 1 FPMU. OPERATIONAL CHECKS WERE GOOD. FADEC P/N 23093345, S/N BX160321