As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE N1 INDICATION BECAME UNSTABLE DURING CLIMB. REPEAT WRITE-UP. THEN EGT EXCEEDED LIMITS AT 952 DEG THEN FUEL FLOW INDICATION BECAME UNSTABLE WITH SURGING AND YAW. REMOVED AND REPLACED THE FUEL FILTER AND THE TEMP INLET SENSOR (T 1.2). REF AMM 73-12-02-4, AND 73-23-06-4. COMPLETED HIGH PWR RUN PER JRH, ALL PARAMETERS WERE WITHIN LIMITS.