On 27 February 2023, an Embraer 190 was flaring for an imminent night touchdown on runway 04R at Boston in normal visibility when a Learjet 60 began takeoff from intersecting runway 09. As the Embraer descended through 30 feet AGL, the Learjet entered runway 04R, taking two seconds to cross it. The incursion had triggered an ATC alert and just after the crossing, the Embraer was instructed to go around and did so from around 10 feet AGL. The Investigation found that the Learjet crew correctly read back their line up and wait clearance but then took off without clearance.