As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6335 - PWM-BOS - ABORTED TAKEOFF DUE TO LEFT ENGINE TORQUE DROPPED TO 40 PERCENT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED TTL BYPASS VALVE, OPS CHECK OK. AIRCRAFT WAS APPROVED AND RELEASED FOR RETURN TO SERVICE. (M)