What was found
FLT 5872 - PIT-PKB - DURING TAKEOFF ROLL, ATC NOTIFIED THE CREW THAT THEY OBSERVED SPARKS FROM THE NR 2 ENGINE EXHAUST. ATC CALLED FOR EMERGENCY VEHICLES TO STANDBY. AIRCRAFT RETURNED TO THE FIELD WITHOUT FURTHER INCIDENT. CREW REPORTED NO GAUGE FLUCTUATION OF ANY KIND. MAINTENANCE REPLACED THE NR 2 ENGINE DUE TO FOD DAMAGE. ALL OPS CHECKS GOOD. AIRCRAFT WAS RETURNED TO SERVICE. (M)