As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE TACHOMETER FAILED ON TAKEOFF ROLL. PRE-INSPECTION, CONNECTOR PLUG SECURED AND SAFETIED. IT WAS DISCOVERED THE LEFT TACHOMETER GENERATOR ELECTRICAL CONNECTOR PLUG ELECTRICAL PINS HAD STRIPPED. CONNECTOR PLUG REPLACED. AIRCRAFT RETURNED TO SERVICE.