As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DESCENT 175 MILES SOUTH OF YZF NR 3 ENGINE RPM DROPPED BELOW 98 PERCENT WITH FLUCTUATION 0.5 PERCENT OUTSIDE LIMITS. WITH ADVANCE OF NR 3 THROTTLE FOR PITCH LOCK CHECK RPM DECAYED. ENGINE PUT TO BED. PROPELLOR VALVE HOUSING DETERMINED TO BE FAULTY, UNIT REPLACED GROUND RUN FOR PITCHLOCK CHECK CARRIED OUT, SYSTEM SERVICEABLE.