As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE OFF FROM VENICE ROTOR TACH WENT TO ZERO, LOW ROTOR LIGHT ILLUMINATED WITH LOW ROTOR HORN. RETURNED TO VENICE, LANDED AND NOTIFIED MAINTENANCE AND CUSTOMER. MAINTENANCE REMOVED AND REPLACED ROTOR TACH GENERATOR. AC GROUND RUN LEAK CHECKED AND OPS CHECKED GOOD. (SW03200405508)