EMB-175 flight crew reported a near mid air collision with a military helicopter while on approach to land.
Synopsis
EMB-175 flight crew reported a near mid air collision with a military helicopter while on approach to land.
Narrative
I was PM & my CA was hand flying a visual approach into rwy XX at night into ZZZ. Around 700ft we heard 'traffic; traffic' and our attention immediately went outside of the aircraft. We started searching for our traffic that was reporting 100 ft below as my CA side stepped to the left of the RWY. We gained visual separation with a helicopter just off our right hand side and continued the approach while maintaining visual separation. We landed safely and brought the occurrence to ATC's attention on the ground.ATC did not alert us of any traffic. I had previously heard ATC tell an aircraft to remain West of our runway and after hearing the TA I immediately recognized that they were told to do so to avoid us. This occurrence happened mere days after the DCA midair collision. That accident should emphasize the importance of communication between all parties. We should be alerted of traffic regardless of what instructions they were given to avoid us. The sooner we know about a potential threat; the more situational aware and safe we will all be.
Second reporter narrative
Blackhawk CH-60 Night time operations at the airfield were in progress at the time of arrival.There were no pilot or controller deviations that I know of.Just making a statement to stress heightened vigilance during this time immediately after a Blackhawk and CRJ accident; which ZZZ Tower; approach; and the military branch may have already been applying anyway during my approach and landing at ZZZ.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.