What was found
"AIRCRAFT REQUIRES A POST MAINTENANCE FLIGHT DUE TO MID CABIN NOISE AND VIBRATION.-POST MAINTENANCE FLIGHT COMPLETED. NOISE / VIBRATION STILL PRESENT."
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
"AIRCRAFT REQUIRES A POST MAINTENANCE FLIGHT DUE TO MID CABIN NOISE AND VIBRATION.-POST MAINTENANCE FLIGHT COMPLETED. NOISE / VIBRATION STILL PRESENT."