As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOTICED ENGINE WHINE WHICH INCREASED IN LOUDNESS AND PITCH WITH INCREASE OR DECREASE IN POWER. REPORTED TO MAINTENANCE. DEMONSTRATED PROBLEM TO MX & CONFIRMED PROBLEM. MECHANIC NOTICED STARTER GENERATOR MAKING NOISE, CHANGED STARTER GEN. DID NOT CORRECT PROBLEM. REMOVED AND REPLACED ENGINE.