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.
他的所有的公开设计的技术都是得到美国联邦航空局认可的。在现有的飞机上也能得到实践。
All his published designs are technically certifiable by the FAA, and can be implemented in airplanes already in use.
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