As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE NR 1 ENG TORQUE FLUCTUATES INTERMITTENTLY +/- 3 PERCENT. DURING APPROACH NR 1 ENG SURGING FROM APPROX 0 PERCENT TO 30 PERCENT TO 40 PERCENT TORQUE. SHUTDOWN ENG FOR ACFT CONTROL. REMOVED AND REPLACED NR 2 TORQUE SENSOR ON LT ENG IAW AMM JIC NR 77-13-61. REMOVED AND REPLACED LT ENG IBV AND PERFORMED ENG RUN UP AN NO TORQUE DROP OR SURGE AT THIS TIME IAW AMM NR 72-01-30.