Bombardier confirms that a fix is being tested for the geared-turbofan failure on a CSeries test aircraft, but both the company and engine maker Pratt & Whitney remain tight-lipped about the cause of the failure and a timetable for return to flight. A PW1500G failed during post-maintenance ground testing on flight-test aircraft FTV1 at Mirabel, near Montreal, on May 29, damaging the engine and the aircraft. Bombardier subsequently stated the failure involved the low-pressure turbine. The ...

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