Aircraft Accident Investigation Report

35 The intake valve installed in the No. 2 engine cylinder was incorrect as indicated by its short length when compared to the other intake valves as seen in Figure 37; this suspect part has a Lycoming part number, but is not correct for this engine model or type certificate. Figure 37 No. 2 Intake Valve as compared to another Intake Valve The No. 3 cylinder intake and exhaust tappets were heavily pitted on the face and showed damage to the edges as seen in Figures 38 and 39. Figure 38 No. 3 Intake Tappet Figure 39 No. 3 Exhaust Tappet