As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, NR 4 PROP FLUX IN NORMAL GOVERNING STEADY AND WITHIN LIMITS IN MECHANICAL. RPM WENT OUT OF LIMITS IN MECHANICAL GOVERNING. PROP WAS NOT PITCHLOCKED, SHUTDOWN IAW AOM. REMOVED AND REPLACED NR 4 VALVE HOUSING PER IAW JOB CARD NR 6103, GROUND RUNS CARRIED OUT IAW JOB CARDS 7101 AND 7101-2 OPS CHECKED GOOD.