As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AND SMELL IN THE COCKPIT ON TAKEOFF ROLL. ABORTED TAKEOFF AND SMOKE QUICKLY DISSIPATED. TAKEOFF ABORTED BELOW 80KTS. MAINTENANCE REPLACED SEAL PRESSURE REGULATING VALVE PER GMM 72-00-00. RAN ENGINES AND NO SMOKE OR SMELL PRESENT. FLIGHT 7619, FIRST FLIGHT AFTER PRESSURE REGULATING VALVE REPLACEMENT, THE SMOKE RETURNED DURING CLIMBOUT. MAINTENANCE REMOVED AND REPLACED THE NR1 ENGINE. THERE HAVE BEEN NO REPORTS OF SMOKE SINCE.