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The National Transportation Safety Board held its first of a three-day investigative hearing Wednesday on the midair collision that took place in January by Ronald Reagan Washington National Airport, killing 67 people.The collision between an American Airlines flight and a U.S. Army helicopter occurred on the passenger flight's descent to land at DCA.The NTSB released several pieces of information ahead of the hearings, including a detailed timeline of communication and locations ahead of the crash at approximately 8:48 p.m. Jan. 29. In communications, the U.S. Army Blackhawk is identified as PAT25. The American Airlines plane was identified as PSA 5342, or in the audio as Bluestreak 5342. The Blackhawk was on a test flight where the pilot was completing an annual test. The crew was wearing night vision goggles.The transcripts include key points in the timeline of communications leading up to the crash, but do not include every radio communication.Air traffic control communication8:33:41 p.m.PAT25: "PAT25 is looking for Cabin John route one route four to Davison."8:33:46 p.m.DCA local controller: "PAT25 approved."8:39 p.m.Flight 5342 was cleared for the Mount Vernon Visual Runway 1 approach to DCA by Potomac Terminal Radar Approach Control.8:42:36 p.m.PAT25 instructor: "The Chain Bridge at seven hundred feet. Good. Next’ll be the Key Bridge. We’ll be down to three hundred."8:43 p.m.Flight 5342 was handed off to the DCA local controller.8:43:09 p.m.DCA local controller: "Bluestreak 5342 Washington Tower winds are three two zero at one seven gusts two five, can you take runway three three?"8:43:36 p.m.PSA 5342: "Yeah, we can do uh three three for Bluestreak 5342."8:43:39 p.m.DCA local controller: "Bluestreak 5342 at the Wilson Bridge change to cir — change to circ(le) runway three three. Runway three three cleared to land."8:43:46 p.m.PSA 5342: "Change to runway three three uh runway three three cleared to land Bluestreak 5342."Cockpit communication of PAT258:43:47 p.m.PAT25 pilot: "We’re at 300."8:43:49 p.m.PAT25 instructor: "Roger got you at four looking for "8:44:27 p.m.PAT25 instructor: "Alright, there’s three hundred for two hundred."8:44:55 p.m.PAT25 pilot: "Two hundred."8:45 p.m.PAT25 altitude: 210 feetPSA 5342 altitude: 1,960 feet 8:45:32 p.m.PAT25 altitude: 390 feetPSA 5342 altitude: 1,580 feetPAT25 instructor: "You’re at three hundred feet. Come down for me."8:45:36 p.m.PAT25 altitude: 410 feetPSA 5342 altitude: 1,510 feetPAT25 pilot: "Go down two hundred."Air traffic control communication 8:46:01 p.m.PAT25 altitude: 280 feetPSA 5342 altitude: 1,170 feetDCA local controller: "PAT25 traffic just south of the Wilson Bridge is a CRJ at one thousand two hundred feet circling runway three three."8:46:08 p.m.PAT25 altitude: 240 feetPSA 5342 altitude: 1,080 feetPAT25: "PAT25 has the traffic in sight request visual separation."8:46:10 p.m.PAT25 altitude: 250 feetPSA 5342 altitude: 1,060 feetDCA local controller: "Vis separation approved."Cockpit communication of PAT25 8:46:34 p.m.PAT25 altitude: 260 feetPSA 5342 altitude: 980 feetPAT25 instructor: "He’s got’em stacked up tonight."Air traffic control communication 8:47:39 p.m.PAT25 altitude: 300 feetPSA 5342 altitude: 450 feetDCA local controller: "PAT25 do you have that CRJ in sight?" The transcript says the sounds of "rapid beeping consistent with conflict alert" were audible in the background.8:47:41 p.m.PAT25 altitude: 300 feetPSA 5342 altitude: 430 feetDCA local controller: "PAT25, pass behind that CRJ." The transmission was interrupted for 0.8 seconds from PAT25 pushing the microphone key.8:47:44 p.m.PAT25 altitude: 290 feetPSA 5342 altitude: 400 feetPAT25: "PAT25 has a — aircraft in sight, request visual separation."8:47:47 p.m.PAT25 altitude: 280 feetPSA 5342 altitude: 360 feetDCA local controller: "Vis separation."Cockpit communication of PAT258:47:52 p.m.PAT25 altitude: 270 feetPSA 5342 altitude: 340 feetPAT25 instructor: "Alright, kinda come left for me, ma’am, I think that’s why he’s asking."8:47:54 p.m.PAT25 altitude: 280 feetPSA 5342 altitude: 320 feetPAT25 pilot: "Sure."8:47:55 p.m.PAT25 altitude: 280 feetPSA 5342 altitude: 320 feetPAT25 instructor: "We’re kinda … PAT25 pilot: "OK. Fine."8:47:56 p.m.PAT25 altitude: 290 feetPSA 5342 altitude: 310 feetPAT25 instructor: "… out towards the middle."8:47:59 p.m.PAT25 altitude: 280 feetPSA 5342 altitude: 290 feetPHNjcmlwdCB0eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPiFmdW5jdGlvbigpeyJ1c2Ugc3RyaWN0Ijt3aW5kb3cuYWRkRXZlbnRMaXN0ZW5lcigibWVzc2FnZSIsKGZ1bmN0aW9uKGUpe2lmKHZvaWQgMCE9PWUuZGF0YVsiZGF0YXdyYXBwZXItaGVpZ2h0Il0pe3ZhciB0PWRvY3VtZW50LnF1ZXJ5U2VsZWN0b3JBbGwoImlmcmFtZSIpO2Zvcih2YXIgYSBpbiBlLmRhdGFbImRhdGF3cmFwcGVyLWhlaWdodCJdKWZvcih2YXIgcj0wO3I8dC5sZW5ndGg7cisrKXtpZih0W3JdLmNvbnRlbnRXaW5kb3c9PT1lLnNvdXJjZSl0W3JdLnN0eWxlLmhlaWdodD1lLmRhdGFbImRhdGF3cmFwcGVyLWhlaWdodCJdW2FdKyJweCJ9fX0pKX0oKTs8L3NjcmlwdD4=