As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB OUT THROUGH 5000 FEET, ENGINE POWER BEGAN TO FLUCTUATE. ENGINE WAS SHUTDOWN AND SECURED. AIRCRAFT LANDED WITHOUT INCIDENT. INVESTIGATION FOUND THAT THE HORSE POWER LIMITER BYPASS VALVE WAS LEAKING INTERNALLY. BYPASS VALVE WAS REPLACED.