As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6543 - IAD-ROA - ABORTED THE TAKEOFF DUE TO THE LEFT ENGINE ONLY MAKING 60 PERCENT TORQUE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE FUEL CONTROL UNIT. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)