nd a certain amount of pressure. Today, the skin of an airplane is much thicker. Also, the windows are a lot smaller. In actuality, the plane could not with hold this amount of pressure and stress.In the PSA crash in San Diego, information was sufficient to both pilots prior to mid air collision. Both aircrews were aware of one another. The 727 aircrew assumed they had the right traffic insight to avoid collision. The Cessna made the mistake of altering his designated heading from tower. Air Traffic Control (ATC) made the mistake of not notify either of the aircrews of collision when the warning went off in the tower. If the Cessna had informed tower of their heading change, this accident would had not happened. Also, both aircraft were on different frequencies. Maybe, if they were both on the same frequency, positive identification of the Cessna from the 727 could have been made.The crash in Washington D.C. with Air Florida could have definitely been prevented. Even though engine instruments were reading abnormally the pilots still took off. Even the sound of the aircraft was not normal. The First Officer noted both of these factors. This accident was human error. First, the captain wanted to get off the ground as soon as possible because they had been delayed so long already. So, the crew decided not to get de-iced again even though they need to. The plane had a inch of snow on it. This process would have delayed their takeoff even more. The snow on the wings reduced their lift greatly. Then, during the pre-takeoff checklist, the engine anti-ice system had been over looked. It was never turned on like it should have been. This accident could have been prevented if the pilots would have been more patient and thorough. Also, the Captain of this flight had received an unsatisfactory grading on a proficiency check in memory items, and knowledge of aircraft. This could greatly be a factor too. All the sufficient i...
