As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAL/LAX - FLT 510 - DURING TAKEOFF, ENGINE NR 1 DID NOT REACH N1 REQUIRED FOR TAKEOFF AT THE RUNWAY HEADING. DUE TO THIS SITUATION, THE AIRCRAFT RETURNED TO GATE. THE NR 1 ENGINE WAS INSPECTED, AND FOUND WITH A CLOGGED FUEL FILTER WHICH WAS REPLACED. AFTER TESTING, TAKEOFF POWER OK, THE AIRCRAFT RETURNED TO NORMAL OPERATION.