Boeing completed the maiden flight of its latest 737 variant, 737 MAX 9, on 13. Apr 2017. The first 737 MAX 9, reg. N7379E, MSN 42987 / LN 6250, powered by two LEAP-1B28 twin-shaft turbofans (fan diameter: 69,4 in / 1.762,8 mm; BPR: 9,0; eng. architecture: F+3LPC-10HPC^2HPT-5LPT), rated at 130,41 kN / 13.298 kgf / 29.317 lbf, took off from the Renton Municipal Airport (RNT), adjacent to Boeing 737's factory, at 10:43 a.m. (PDT), and landed on King County International Airport / Boeing Field (BFI), five miles south of downtown Seattle, at 1:26 p.m. (PDT).
The two hour, 43 minute test flight was designed to put the plane through a series of moderate tests, including shutting down and restarting the engines one at a time, checking flap setting, and cycling the landing gear. Tests over the course of the year will become more and more involved and push the airplane further, to prove to the FAA that the longest 737 MAX, so far, is safe and ready to fly passengers.
The Boeing 737 MAX 9 can carry up to 220 passengers in a single-cabin layout, but more typical first class and coach configurations will carry 180 (12F+168Y) passengers. It's capable of flying up to 3.515 nmi / 4.045 mi / 6.510 km non-stop, enabling it to fly routes such as New York to London, the company says.
The plane is the second and currently the largest installment in the company's 737 MAX family of aircraft. The 737 MAX 9 bests its older and smaller sibling, 737 MAX 8, by 8,7 ft / 2,64 m in length.
The slightly smaller 737 MAX 8, the first of Boeing's newest workhorse jets, was certified for delivery to airlines in early March. Because of its nearly nine feet increase in the length and 16 additional seats, the MAX 9 will only have to complete about 30 percent of the testing performed on the MAX 8. The engines are the same.
Boeing 737 MAX 9, reg. N7379E, MSN 42987 / LN 6250, maiden FLT BOE901 (RNT-BFI) (click on the image)
... a few articles (just click on the images)
... a few pictures from the event
... and a video of the Boeing 737 MAX 9´s maiden flight
P.S. The fr24 link, I have found, incorrectly displays that the aircraft took off from the Grant County International Airport (MWH). This little confusion in their view leads me to the thought that the aircraft, prior to the first official flight, may have had a short test roundtrip RNT-MWH-RNT, far from the public eye. Maybe, just maybe ...