这次交付经过了美国联邦航空局对发动机的几次修改认证。
This delivery comes on the heels of FAA certification of several modifications to the engine.
NEXRAD数据也可以被美国联邦航空局用作对飞行雷达的覆盖，以提高飞机的安全。
NEXRAD data is also used by the FAA as an overlay on flight radar to enhance aircraft safety.
美国联邦航空局也在起草新的规定，以广泛地处理飞行员疲劳问题，并将考虑采纳委员会的建议。
The FAA is also in the process of drafting new rules to broadly address pilot fatigue and will consider the board's recommendations.
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