question for you what role did the faulty tubes play? if they were iced over. they knew they were bad tubes and they didn t replace them when they didn t replace them and it could have given error readings and could give false impressions as to how fast the airplane is flying. heather: thank you so much for your insight. thank you. we did some research and flight crew error got the blame in some other big crashes. on march 27, 1977 a pan am flight collided with a klm aircraft that took off without proper clearance and 327 people died and then a flight was shot down when it entered soviet air