As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION FELT DURING FLIGHT THAT CORRELATED TO THROTTLE POSITION. BLACK SOOT FOUND ON ENGINE NR 2. FOUND STARTER TO HAVE INTERNAL DAMAGE. REPLACED DEFECTIVE STARTER WITH CUSTOMER SUPPLIED OVERHAULED REPLACEMENT STARTER IAW P300 AMM 24-31-01. OPERATIONAL CHECKS SATISFACTORY. NO DEFECTS NOTED. STARTER GENERATOR UNSCHEDULED REMOVAL INSPECTION CONPLIED WITH SATISFACTORY.