Some small aircraft engines must now be inspected for cracks, or replaced

The US aviation regulator is requiring inspections for a specific model of small aircraft engine. This is because cracks have been found in the cylinder heads, which can cause coolant to leak into the engine.

This rule means owners of these specific Continental engines must now inspect them. If cracks are found, they must replace the cylinder heads. This directly affects the operating costs and maintenance schedules for these aircraft.