As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JLN - ON FINAL APPROACH, RIGHT ENGINE BEGAN SURGING. PILOT MADE A PRECAUTIONARY SHUT DOWN ON THE RIGHT ENGINE AND LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS INSPECTED FOR A FERRY FLIGHT TO HOT. AFTER ARRIVING IN HOT, IT WAS DETERMINED THE P3 ROLLING DIAPHRAGM WAS DEFECTIVE IN THE RIGHT ENGINE FUEL CONTROL.