Helicopters flying through that corridor have to stay at 200’ or lower. They think this one was at 350’ at the time of the impact.
The 200’ ceiling is specifically in place to avoid this exact incident from happening, so planes landing at DCA will safely pass above. But there’s also the matter of the runway change which caused the jet to encroach into the helicopter corridor.
What’s the title of the book and the movie… a series of unfortunate events.
NTSB briefing just said that tower recordings show the Blackhawk was at 200ft and airplane flight recorder shows it was at 325ft. One of them is obviously wrong which is more scary than someone made a mistake.
The ADSB data from the playback seem to show the helo at over 300’ and climbing.
I know that ADSB can be somewhat unreliable at times, but I tend to believe it in this case.