What was found
ON FINAL APPROACH, MC486 POWER WAS REDUCED, THE COMPRESSOR BEGAN TO STALL, AC LANDING WAS UNEVENTFUL. MECHANIC INSPECTED ENGINE INLET AND COMPRESSOR AREA, COMPLIED WITH AIR LINE LEAK CHECK, TIGHTENED 2 GOVERNOR LINE FITTINGS, RINSED THE ENGINE AND FOUND EVIDENCE OF GRASS PARTICLES. GROUND RAN, LEAK CHECKED THE ENGINE. AIRCRAFT WAS RETURNED TO SERVICE.