As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, LH VIB GAUGE AT 1.5, OUT OF 6,000 FT VIBE GAUGE HIT 1.9 IN THE CAUTION RANGE. RETURNED TO FIELD. NO EMERGENCY WAS DECLARED. INSPECTED FAN BLADES FOR STIFFNESS ON LH ENGINE AND FREED STUCK BLADE. PERFORMED VIBRATION CHECK . VIB CHECK NORMAL NO ABNORMAL INDICATIONS. PERFORMED FAN LUBE.