As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENG AIRBORNE VIBRATION N1 INDICATION 5.0 AMBER BAND AT FL 350. VIBRATION WAS FELT IN THROTTLE AND CONTROL COLUMN. SHORTLY AFTER VIBRATION ONSET AND COMPLETION OF HIGH VIBRATION QRH CHECKLIST. EXPERIENCED A COMPRESSOR STALL AND HIGH EGT, AIRCRAFT DIVERTED TO BKO. ACCOMPLISHED BOROSCOPE AS PER MM 72-00-00, NO DEFECTS NOTED REMOVED AND REPLACED BVCU AND TPU AS PER MM 75-32-01 AND 75-32-15 OPS CHECK OK