As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT WHEN INCREASING AIRSPEED ABOVE 225KNTS UNKNOWN SOUND & VIBRATION. FLIGHT ATTENDANT REPORTED VIBRATION IN FLOOR AROUND ROW 4 & 5. INSPECTION FOUND NR 1 RAMP AIR VLV ACTUATOR SUPPORT ELONGATED. R & R SUPPORT IAW 21-25-01 AMM, OPERATIONS CHECKED GOOD.