As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MOD - TO HEAVY MOD VIBRATION FELT DURING CLIMB 339IAS. FL250 CLIMBING VIBRATION CAME ON ABRUPTLY AND FELT AS IF SOMETHING WAS GOING TO COME OFF. AFT FLT ATTENDANT THOUGHT IT WAS SEVERE, 100 TIMES STRONGER THAN ANYTHING SHE HAS EVER FELT. OPBLM FIELDS. SAMC TEXT: CREW UPDATE; VIBRATION STOPPED AFTER SLOWING BELOW 320KTS AND LEVELING OFF. STAYING AT FL240.