According to a government official involved in overseeing airplane safety during the last year, over 75 percent of the voice-recorder tapes taken from small airplanes involved in relatively minor accidents record the whistling of the pilot during the fifteen minutes immediately preceding the accident  Even such minor accidents pose some safety risk
Ttherefore, if passengers hear the pilot start to whistle they should take safety precautions, whether instructed by the pilot to do so or not
ignores the fact that in nearly one-quarter of these accidents following the recommendation would not have improved passengers' safety