I lost interest in Air Crash Investigation after it white washed the true cause of TWA 800's demise but this excellent show is back in my good books. Air Crash Investigation is a resolutely scientific television show so well done them for moving out of their comfort zone and mentioning an a true story, even if just in passing. The fact is, Flight 401 was not just a ground breaking (no pun intended) crash that had significant ramifications in pilot training and air traffic control, it became associated with multiple witness sightings of the dead crew, who were seemingly desperate to ensure the crash never happened again. Whilst the Airline Company did their utmost to poor scorn on the stories, they scrambled to fix the problem and managed to do so by recalling all the recycled parts of the stricken plane which had found their way into other planes. Of course, in true Wikipedia fashion Wikipedia tries to cast doubt on the story by suggesting the book is made up but neglects to mention that the author had an inside source, a flight attendant he married and would go on to write her own book about the phenomenon.