As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT APPROXIMATELY 7000`, THE RT MANIFOLD PRESSURE STARTED DECREASING, AS MORE POWER WAS APPLIED, THE ENGINE STARTED SURGING. AS A PRECAUTIONARY MEASURE AN EMERGENCY WAS DECLARED. THE RT ENGINE BEGAN TO HAVE SIGNIFICANT DROPS IN MANIFOLD PRESSURE AND WAS SECURED. LANDING CARRIED OUT WITH OUT INCIDENT WITH ESCORT BACK TO BASE. O/H INTERVAL 2000.0 HRS.