What was found
ENGINE GOVERNOR DROPPED TO BETWEEN 90 PERCENT TO 95 PERCENT N2 IN CRUISE FLIGHT, MADE PRECAUTIONARY LANDING ON BEACH. INSPECTED GOVERNOR LINKAGE, AND PNEUMATIC LINET TO GOVERNOR, TEST FLOWN COULD NOT DUPLICATE DROP, GOVERNOR HAD APPROXIMATELY 4 HOURS TSO. SUBSEQUENT FLIGHTS AIRCRAFT EXPERIENCED DROP IN N2, GOVERNOR LINKAGE AND PNEUMATIC LINES INSPECTED. GOVERNOR REPLACED AFTER TROUBLESHOOTING WAS EXHAUSTED. (K)