Patent attributes
A method is provided for establishing availability of a two-engine aircraft for a predefined ETOPS flight. The method may include calculating a probability of a dual independent engine shutdown sequence for each of a climb phase, a plurality of cruise phases including an ETOPS phase, and a descent phase into which the predefined ETOPS flight is divisible. The shutdown sequence may be composed of events that for each phase may include events having respective, conditional probabilities specific to a model of the two-engine aircraft, a product of which is the probability of the shutdown sequence for the respective phase. The method may include calculating the risk of the shutdown sequence as a function of a sum of the probabilities for the phases, and establishing availability of the aircraft based on the risk and a preexisting baseline. A similar method is provided for establishing availability of an ETOPS flight path.
