As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUS - ABORTED TAKEOFF - FLT 0673 - WHILE PREPARING FOR TAKEOFF AT TUS EN ROUTE FOR PHX WHEN THRUST WAS APPLIED A LAG WAS EXPERIENCED IN THE NR 2 ENGINE. TAXIED OFF RUNWAY AND PERFORMED TWO MORE THROTTLE ADVANCES TO POWER WITH NO LAG EXPERIENCED. CONTACTED MOC AND DEPARTED TOWARD SCHEDULED DESTINATION.