As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED N2 VIB ON RIGHT ENIGINE. RAN QRH DID NOT SHUT DOWN ENGINE. DECLARED EMERGENCY. NORMAL LANDING. DIDN€™T SEE VIB ON THE GROUND AT ALL. (FLT 3942) CLOSED REMOVED AND REPLACED SIGNAL VIB. ENGINE CONDITIONER UNIT IAW AMM. RAN RIGHT HAND ENGINE IAW AMM. OPS CHECK GOOD NO DEFECTS NOTED, ALL PARAMETERS NORMAL.