| 21. | Each coach will furthermore feature a black box to assist in accident investigations.
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| 22. | Air Accident Investigation Branch inspectors were expected to arrive Thursday, a spokesman said.
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| 23. | SUVs are used solely for commercial vehicle enforcement and accident investigations.
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| 24. | An accident investigation board determined that the crash was caused by pilot error.
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| 25. | The accident investigation pointed to a faulty oxygen system that incapacitated the pilot.
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| 26. | The accident investigation board recommended the use of seatbelts in trains.
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| 27. | The results of the formal accident investigation have not been announced.
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| 28. | The accident investigation found that Air Traffic Control was to blame.
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| 29. | Columbia Accident Investigation Board site : www . caib . us
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| 30. | Numerous phone messages were left at BEA, France's Accident Investigation Bureau.
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