As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD-HPN - FLT 6405 - ABORTED THE TAKEOFF, DUE TO THE LEFT ENGINE NOT MAKING TAKEOFF TORQUE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE OPENED DMI NR 021143 IAW MEL 76-2. MAINTENANCE LATER CLEARED DMI NR 02113 BY RUNNING ENGINE AND FOUND A FAULTY TTL BYPASS VALVE, AND REPLACED THE VALVE. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (W)