Mitsubishi Aircraft Corp. has mounted the Pratt & Whitney PW1200G geared turbofan (GTF) engine onto the first MRJ flight test aircraft in preparation for first flight in early 2015.

The work was performed at Mitsubishi Heavy Industries’ (MHI) final-assembly factory. According to a company statement, this engine mount marks a significant milestone toward MRJ’s completion.

On June 5, Pratt & Whitney delivered the first PW1200G engine to Mitsubishi Aircraft for installation on the MRJ.

Seven test aircraft will make up the MRJ program. The MRJ’s first flight is targeted for the second quarter of 2015. First delivery is slated for the second quarter of 2017.