As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF THRUST ON ENG 1 DURING REDUCTION TO FLIGHT IDLE. DURING LOSS OF THRUST ITT DROPPED SIGNIFICANTLY. ONCE THRUST WAS APPLIED TOOK APPROX. 10 SECONDS FOR ENG 1 N1 TO MATCH ENG 2 N1. PERFORMED ENGINE RUNS OF #1 AND #2 ENGINE IAW ERJ 175 AMM 71-00-01 AND GE CF 34-8E LMM 72-00-00 NO DEFECTS NOTED SEE AML PG 5107930 ITEM 3 FOR FURTHER TROUBLESHOOTING REQUIRED FOR THRUST REDUCTION EVENT.