As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT RPM INDICATION ABNORMAL PERFORMED PRECAUTIONARY SHUTDOWN. INSPECTION FOUND TACH GENERATOR SHAFT BROKEN. REMOVED AND REPLACED TACH GENERATOR IAW AMM 77-11-03. ENGINE GROUND PERFORMANCE RUN C/W AND PASSED. ALL PARAMETERS NORMAL. AIRCRAFT APPROVED FOR RETURN TO SERVICE.