Mitsubishi Aircraft Corp.’s decision in April to delay the MRJ program by more than a year has not yet affected Pratt & Whitney’s schedule to develop the PW1200G geared turbofan (GTF) powerplant for the aircraft, evidenced by the start of engine flight testing this week on Pratt’s flying test bed 747SP (ATW Daily News, April 26). The PW1217G affixed to the test bed 747 will undergo about 60 hr. of initial flight testing over the next 4-5 weeks. Speaking to ...

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