What was found
ENGINE LOG ENTRY JANUARY 3, 1991, FOR REMOVAL AND REPLACEMENT OF ALL 6 ENGINE CYLINDERS. CYLINDERS INSTALLED WERE CERMICRON CYLINDERS, FLANGES WERE PAINTED ORANGE. AIRCRAFT EXPERIENCED ENGINE FAILURE DUE TO NR 2 CYLINDER LOOSENED FOR THE ENGINE CASE. THIS WAS DUE TO PAINTED NUT SEATS. SB, TELEDYNE CONTINENTAL, NR SB 96-12, PAGE 5 OF 7, HAS WARNING OF PAINTING CYLINDER FLANGE IN NUT SEATS, SKIRT OR FLANGE. SB WAS NOT IN EFFECT IN 1991, WHEN THE WORK WAS ACCOMPLISHED. AIRCRAFT HAD ONLY 400 HOURS SINCE OVERHAUL.