| 31. | The investigation resulted in an emergency airworthiness directive that affected 13 Cessna 400s.
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| 32. | It failed several key criteria during airworthiness evaluation tests.
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| 33. | In the US, the FAA requires aircraft to have an airworthiness certificate.
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| 34. | The CAA left the Airworthiness Directive requiring repetitive inspections in place, however.
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| 35. | Each airworthiness certificate is issued in one of a number of different categories.
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| 36. | He said that there were no doubts about the plane's airworthiness.
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| 37. | The MDZFW is limited by strength and airworthiness requirements.
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| 38. | It gained a Certificate of Airworthiness in July 1972.
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| 39. | But nine planes also had violations that the FAA said affected safety and airworthiness.
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| 40. | That led to the FAA's recent " airworthiness directives ."
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