As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 717 FROM ELP TO STL. ON TAKEOFF ROLL, THE CAPTAIN'S AIRSPEED INDICATOR READ 30 KNOTS LESS THAN THE FIRST OFFICER POSITION. ABORTED TAKEOFF AND AIRCRAFT RETURNED TO RAMP WITHOUT FURTHER INCIDENT. INSPECTED CAPTAIN'S PITOT PROBE AND FOUND DEBRIS LODGED IN PITOT TUBE. CLEAN DEBRIS AND BACK FLUSH PITOT LINE IAW B727 MM 34-11-00, PAGE 209B. OPS CHECKS GOOD, NO OTHER DEFECT NOTED AND AIRCRAFT RETURNED TO SERVICE.