As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT, AMBER VIBRATION IN N2. FOLLOWED QRH, PULLED BACK ON POWER VIBRATION MESSAGE DISAPPEARED. RETURNED TO DEPARTURE, REPLACED LT ENGINE OIL FILTER, AND RAN LT ENGINE IAW AMM. DID NOT RECEIVE N-2 VIBRATION INDICATION COULD NOT DUPLICATE FAULT. VIBRATION CHECKED GOOD.