The European Operators Flight Data Monitoring Working Group B–part of the European commercial aviation safety team (ECast)–last week released its study into the precursors of runway excursions. The objectives of the working study were to create best practices for addressing runway excursion problems, as well as to provide guidelines for implementing flight data monitoring (FDM) software tools to identify relevant data. The study also presents the algorithms proposed to potentially address each of the recommendations identiﬁed.
Among the 31 excursion precursors identified are bounced (mainwheels or nosewheels), off-center, nosewheel-ﬁrst or asymmetrical landings; excessive threshold crossing height; and unstable approaches. The working group hopes to enlighten pilots on how to recognize and deal with these overrun precursors.
Initially, precursors were assigned a maturity level depending on how early in the program the precursor was identified. Each was also classified by phase of flight, from engine start to taxi in. Precursor identification also required a quality assurance program to provide insights about the overall quality of the precursor and used data such as the number of flights from any one operator, the aircraft type, sampling rate and issues encountered during implementation.