Air carrier crew reported an NMAC at BOS during initial climb when another aircraft executed a go-around on an intersecting runway.
Synopsis
Air carrier crew reported an NMAC at BOS during initial climb when another aircraft executed a go-around on an intersecting runway.
Narrative
Holding short on taxiway Lima at BOS we were cleared to line up and wait on 15R behind departing traffic; with a warning that traffic was on a 2.5 mile final for the 4R intersecting runway. After a period we were cleared to takeoff with a left heading 060. After accelerating to rotate speed the hold short lights appeared underneath the aircraft. Receiving no further instruction takeoff continued until the intersecting traffic on 4R was spotted doing a go around that placed them in our flight path. Maneuvers were taken immediately to avoid collision; shortly after ATC contacted with instructions to 'stay low'. Once clear the flight was flown as planned.Cause: There was miscommunication about when the landing traffic would arrive relative to our takeoff clearance. As soon as the controller realized they issued a go around to the other aircraft. Our aircraft already several hundred feet above in a climb out meant this put them in our flight path resulting in evasive maneuvers being needed.
Second reporter narrative
We were cleared for takeoff from 15R and told there was a plane on a 2 1/2 mile final for ILS 4R. I applied Takeoff Power and started rolling and then noticed the Red Lights come on on 15R. The speed of my aircraft was below 80KTS. Upon becoming airborne I saw the landing traffic and estimated that if we both continued as we were I would have passed over them without a problem. Then I heard ATC tell the plane landing on 4R to 'go around'. I remember thinking 'not a good idea'. I saw the other plane start to go around and turn to the left as instructed. This action made the plane start turning towards me. I immediately started to descend to stay clear of the plane going around. Almost simultaneously ATC told us to 'Go Low'. After clearing the danger area I asked if we should continue on the assigned heading of 060. A new controller said yes and then we were sent to departure on 133.00Cause: ATC overload and me not aborting the takeoff when the runway lights turned red despite being cleared for takeoff.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.