Boeing has now certificated the first of the new Max versions of the 737. The Max8 has now entered service. I first saw a Max at some distance across San Francisco Bay as I wrote about here. I was passing Renton so I thought I would have a quick look at what was on the flightline. A few of the new jets were mixed in with the current builds of the NG aircraft. Customer jets were clearly awaiting delivery while a Max9 was also on the ramp. The test program for the Max9 is at a far earlier stage although it will be a shorter program given the amount of testing already completed by the Max8. A Max8 was close by and one awaiting delivery was behind the Max9.