By 1958, about the time of transition from propeller to jet aircraft, a transition that cost millions of dollars in training costs, a number of airlines had established mandatory age 60 retirement rules for pilots. Among them, American Airlines and its CEO C. R. Smith was having .
to concede to the pilots union following a nearly one month strike in which, among other demands, American's age 60 rule was rescinded. Smith, seeking to solve the labor problem, specifically his desire to remove pilots over 60 from the flight deck, wrote a letter to the administrator of the FAA, Quesada, requesting assistance in establishing a regulation that would .
force the retirement of pilots at age sixty (Chronology). In December of 1959 the Age 60 rule came into effect (Ironically, after retiring from the FAA in January 1961, Quesada was immediately appointed to the Board of Directors for American Airlines (Chronology)).
Quesada admitted in a letter to the president of Notre Dame University on April 12, 1959 that "There exists at present no sound scientific evidence that airline piloting, or any other aeronautical activity, becomes critical at any given age" (Chronology). Despite this, the age 60 rule continues to be justified by claims that the human factor of age leads to decreased performance in cognitive skills and an increased risk of pilot incapacitation from age related illnesses such as heart attack or stroke (Woerth). A study of contributing human factors to aviation crashes, utilizing data from the FAA and NTSB, concluded that although errors by pilots contributed to as many as 80% of crashes, " the prevalence and patterns of pilot errors [does not] appear to change significantly as age increases from the 40s to the 50s and early 60s" (Gouha et al.).
It is well known that elderly men and women are at higher risk of debilitating illness or loss of cognitive skill over time, however, airline pilots are subjected to routine, comprehensive medical and performance evaluations which are designed to identify medical problems and/or loss of cognitive ability.