As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) VIBRATION FELT IN AFT CABIN WHEN THE N1 IS ABOVE 86% ON THE #2 ENGINE. ALL COCKPIT INDICATIONS WERE NORMAL. DAMAGE FOUND ON THE ACCOUSTIC PANEL AT LP COMPRESSOR (FAN) CASING 4-6 O''''CLOCK POSITION, WITHSOME DEBRIS STUCK ON THEO.G.V., CAUSING TURBULENT FLOW IN THE COLD STREAM AREA. REPAIR CARRIED OUT ON ACCOUSTIC PANEL.