As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT LEVEL OFF AFTER POWER SET AT 86 PERCENT N1. LT ENG VIB INCREASED .8 TO 3.3 THEN 2.0. VIBS FELT IN YOKE & FUSELAGE. ACCOMPLISHED BORO ON 1 AND 2ND HPT, AND 3RD STAGE LPT, NO DEFECTS FOUND. REPLACING ENG VIB PICK-UP LM2031 THAN CLOSE UP. REPLACED ACCELEROMETER. ALL CHECKS GOOD.