Pratt & Whitney has made a preliminary determination of the root cause of the PW1500G geared-turbofan engine failure during ground tests on a CSeries and is working with Bombardier “on a plan to resume testing in the next few weeks,” said Greg Hayes, CFO of parent company United Technologies Corp. “We believe we have an understanding of what has occurred,” he told analysts Thursday morning. “If we are correct in our thinking it can be rapidly ...

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