What was found
ON ENGINE START-UP, REAR PASSENGERS NOTED GREATER THAN USUAL SMOKE EMITTED FROM EXHAUST ON NR 1 ENGINE. THE PILOT SHUT DOWN AND PERFORMED A VISUAL INSPECTION OF THE ENGINE NACELLE FOR OIL AND/OR OTHER ABNORMAL CONDITIONS: NONE NOTED. THE PILOT PERFORMED ANOTHER START WITH SIMILAR RESULTS OF LIGHT SMOKE WHICH DISSAPEARED WITH INCREASED RPM. THERE WERE NO UNUSUAL GAUGE INDICATIONS ON HIGH POWER RUN-UP. MAINTENANCE WAS CALLED TO INVESTIGATE. THE NEXT START-UP PRODUCED LITTLE SMOKE. A PRECAUTIONARY CYLINDER COMPRESSION CHECK REVEALED NR 1 CYLINDER TO HAVE BELOW SPEC. COMPRESSION. THE CYLINDER WAS REMOVED FOR INVESTIGATION AND REVEALED WORN CYLINDER WALLS AND A STUCK OIL CONTROL RING. THE CYLINDER/PISTON AS