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ACCIDENT RISK ASSESSMENT OF SIMULTANEOUS CONVERGING INSTRUMENT APPROACHES

Simultaneous Converging Instrument Approaches (SCIA) on airport runways have the potential to compromise established safety levels. The risk of a mid-air collision due to a doubled miss approach (DMA) is one of the more common safety issues of SCIA. This paper describes how an advanced accident risk assessment methodology is applied to an example of SCIA at a converging runway combination at Schiphol Airport in Germany. When the obtained results are compared against FAA established SCIA criteria, even though it is shown that situations exist in which the FAA criteria are not met, the collision risk is not any higher than for similar situations that would satisfy these criteria. This implies that for Schiphol Airport, a specific change can be introduced as being risk neutral. For other airports, the implications is the with converging runways, there might be room for developing new or improved SCIA without compromising safety.