As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN. PILOT REPORTED ENGINE NR 1 HAS A N-1 VIBRATION OF 4.0 AMBER THROUGH FL 270. FLUCTUATED BETWEEN 3.4-4.0 IN CLIMB TO FL360. AT FL360 ENGINE VIBE 4.0 AMBER AN NOT ABLE TO REDUCE VIBE WITH THRUST LEVER CHANGE. LP VIBE SPIKE. HP VIBE NORMAL.; FOUND W9B HARNESS ON NR 1 ENGINE TO BE DAMAGED. R & R W9B HARNESS. PERFORMED ENGINE VIB CHECK IAW EMM 72-00-00 TESTING 003 LP VIBES FOUND TO BE AT 1.0 UNITS, HP AT 1.6 UNITS. BOTH WITHIN LIMITS. ACFT OK FOR CONTINUED SERVICE AT THIS TIME.