KDCA 3/1/25 1100-1430Z TCAS TA/RA phantom alerts & go-arounds

[baldiedc]

Back on morning of Saturday 3/1 between 1100-1430Z (6-9:30am), multiple aircraft on approach to DCA Rwy 19 reported 'phantom' TCAS TA's and RA's resulting in 3 go-arounds, no one reported seeing anything visually.

Here's cut from Tower feed spanning 1100-1430Z, heavily edited down for content and time.  FAA investigating per news reports.

https://www.cbsnews.com/news/dc-airport-false-collision-alerts/?ftag=CNM-00-10aab6a&linkId=763871777

See attached approach map for Rwy 19 for DARIC and GREYZ locations.

11:25:45 JIA5328 3 TAs - Kennedy center and 2 prior
11:27:35 JIA5153 3 TAs - directly over river by RORRK, headed NW along the river
11:28:17 JIA5153 traffic 800ft above
11:28:57 JIA5153 another TA
11:44:22 JIA5639 TA prior to SLAKR just after RORRK
11:50:00 AAL1611 TA 600ft RORRK and SLAKR
11:53:07 JIA5261 RA/descend +400ft above & another target 800ft - GO AROUND
11:54:19 JIA5647 TA
11:55:40 JIA5444 TA
11:58:15 EDV5006 TA "right on top of us"

12:00:15 JIA5261 TA @ RORRK
12:21:35 JIA5312 RA - GO AROUND
12:25:00 RPA4576 TA
12:29:45 JIA5312 TA @RORRK
12:45:05 RPA4549 RA - GO AROUND

13:19:00 RPA4717 TA @1800-2000ft target 700ft below

14:04:33 RPA4469 RA @1200ft; continued to land "something diving straight onto us"
14:06:46 RPA4538 TA 600 ft above
14:07:00 JIA5197 TA before DARIC no altitude
14:10:44 RPA5802 RA over GREYZ @1200ft; RA to descend, target 200ft above, saw nothing; continued to land
14:12:15 JIA5146 TA at 11 o’clock

(all times Zulu)

[Rick108]

Very interesting - I wonder what is going on over there?  And just to clarify, those waypoints are RORRK (on the River Vis 19) and SLAKR (on the RNAV Y 19).

[baldiedc]

Great thanks for clarifying those waypoints I couldn't get them, was using opennav.com which I guess isn't so open - it doesn't have RORRK and puts SLAKR in GA