As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT TOD, CREW REPORTED BUMP NOISE AT APPROX SAME TIME MCC RECEIVED SURGE REPORT FOR THE LEFT ENG. ENG PARAMETERS WERE ALL NORMAL. BOTH ENGS UPON ARRIVAL AT THE GATE. EICAS SHOWED LEFT ENG SURGE DET. T/S PER FIM 71-05-00 FIG 103B. BORO INSP AND ENG RUN NORMAL.