10. Why would the FAA and the NTSB both be investigating the accident: 11. Ellwood Driver jumped to the conclusion that something was the probable cause of the engine coming off of the airplane. What was it? 12. Who was the person that refuted Driver's assumption? (refer to Q12.) 13. There were three types of investigations occurring within days of this accident. One was the FAA ordered DC-10 fleet inspection on all pylon attach bolts. What were the other two? 14. What report was generated about American Airlines maintenance practices? 15. How did that report generate so much controversy? 16. What was the amount of check that American Airlines received from Aviation Underwriters Insurance? 17. What was in the letter that American Airlines sent to the victims families