'Flight Crew Incapacitation' - No 12 in the BEA France series 'Incidents in Air Transport' (2011) The statistical approach to the question of air transport pilot incapacitation appears to demonstrate the absence of any significant air safety risk. However, investigations of cases of pilot incapacitation reveal the existence of factors that could contribute to accidents, and such occurrences are treated as serious incidents. The incidents presented in this IAT show that the risk inherent in medical conditions may sometimes be under-estimated once a medical certificate has been obtained. The decision not to fly, due to what appear to be minor health problems, is a hard one to take, yet such problems can rapidly become incapacitating and disrupt the conduct of the flight.