As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 2 ENG SURGE, CRUISE FL 220, ENGS WERE RUNNING AROUND 74% N1 NR 2 ENG SURGED UNCONTROLLED AT 20 TO 305 TO 40%. BROUGHT NR 2 ENG BACK UNDER 60% & STABILIZED. STAYED UNDER 60% UNTIL LANDING, RT ENG CONTROL LIGHT ILLUMINATED ON GND. TROUBLE SHOT IAW FIM TASK 71-05-00-810-805-F00. RUN NR 2 ENG, FOUND NO FAULTS. OPERATIONS CHECKED NORMAL. LP 9127188 PRECAUTION. R & R NR 2 HMU IAW 73-21-10. OPERATIONS & LEAK CHECKED GOOD.