At the conclusion of the first phase, the agency anticipates more than one company will be ready to compete for the second certification phase contract.

在第一阶段的结尾，该机构预计有一个以上的公司将准备竞争第二个认证阶段合同。

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Investigators are trying to find the answer to a problem that eluded Boeing and the FAA in the certification phase, even though the manufacturer and the regulator were well aware of the risks posed by lithium-ion batteries.

FORBES: Is Boeing's 787 Battery Design Flawed? Ask Elon Musk

The second phase of certification will result in a separately competed contract.

ENGADGET: NASA awards Boeing, SpaceX and Sierra Nevada $30 million in contracts

The second phase of the certification contract, expected to begin in mid-2014, will involve a full and open competition.

ENGADGET: NASA awards Boeing, SpaceX and Sierra Nevada $30 million in contracts