| 1. | It either happened because of a mechanical failure or a crew failure,
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| 2. | Officials said the accident was caused by mechanical failure and driver error.
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| 3. | The unit shut unexpectedly on Aug . 28 because of mechanical failures.
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| 4. | He said the only other possible cause appeared to be mechanical failure.
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| 5. | One was grounded due to mechanical failure and the other was diverted.
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| 6. | Cain said his investigation will focus on mechanical failure and human factors.
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| 7. | It was nothing obvious and there appeared to be no mechanical failure,
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| 8. | Unfortunately a mechanical failure during a turn caused the building to collapse.
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| 9. | German officials say early indications point to mechanical failure as the cause.
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| 10. | The Raptors arranged for a backup jet in case of mechanical failure.
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