Boeing has build and delivered it's 4000th 737-NG series aircraft this week to China Southern Airlines. Now, 4000 737-NG's... that's a lot of frames buzzing around the world in various different configurations (including the  -600 Series, -700, 700ER, -800, -900 and 900ER... and then there's the militarised and business variants... ) The gap between 1000th, 2000th, … [Read more...]