Quantifying Pilot Contribution to Flight Safety During an In-Flight Airspeed Failure

Accident statistics cite the flight crew as a causal factor in over 60% of large transport fatal accidents. Yet a well-trained and well-qualified crew is acknowledged as the critical center point of aircraft systemssafety and an integral component of the entire commercial aviation system. A human-in-the-loop test was conducted using a Level D certifiedBoeing 737-800 simulator to evaluate the pilot’s contribution to safety-of-flight during routine air carrier flightoperations and in response to system failures. To quantify the human’s contribution, crew complement was used as an independent variable in a between-subjects design. This paper details the crew’s actions and responses while dealing with an in-flight airspeed failure.