As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BUFFETING/GRINDING NOISE INTERMITTENT AT ALL ALTITUDES AND SPEEDS. FOUND STARTER/GENERATOR ON LT ENGINE VIBRATING EXCESSIVELY. REMOVED AND REPLACED GENERATOR IAW ULTRA MM 80-11-01. GROUND RUN OPERATIONAL CHECKS SATISFACTORY. EXTERIOR INSPECTION OF AC REVEALED NO FAULTS.