As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRFRAME VIBRATIONS. FLIGHT DIVERTED. CREW REPORTS WITH CLEAN AIRCRAFT CONFIG AND CLEAR AIR ON CLIMBOUT 340KTS FL 260 ENCOUNTERED MODERATE AIRFRAME VIBRATIONS. PULLED POWER BACK & VIBRATIONS CEASED 300KTS. CREW FILLED OUT VIBE REPORT. UNABLE TO ISOLATE VIBRATION. REPLACED SEAL ON PANEL IAW MM.