As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/JFK - FLT 6485 - DURING TAKEOFF AT 1320 HOURS ON 7-31-97, MADE AN UNSCHEDULED LANDING DUE TO LT ENGINE HAD TORQUE FLUCTUATION. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND RAN AIRCRAFT AND COULD NOT DUPLICATE PROBLEM. OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (X)