As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXCESSIVE N1 VIBRATION ON RH ENG. RAN QRH PROCEDURE. DID NOT CORRECT ISSUE AT NORMAL POWER SETTINGS. HAD TO REDUCE RH THRUST TO 72-73% TO KEEP VIB BELOW 1.7. / REMOVED AND REPLACED RH ENGINE FAN BLADE PINS IAW CRJ900 AMM 72-21-02-400-801-A01-PSA. PERFORMED VIBE CHECK IAW CRJ 900 AMM 71-00-00-720-806-A01.