As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ABORTED TAKEOFF DUE TO LEFT ENGINE TORQUE FLUCTUATION. THE SYSTEM WAS INSPECTED AND THE BYPASS VALVE WAS FOUND TO BE AT FAULT. THE VALVE WAS REPLACED AND A FUNCTIONAL CHECK OF THE SYSTEM PERFORMED WITH ALL INDICATIONS NORMAL. (M)