# NTSB investigations, DC: Near midair/TCAS alert/loss of separation

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB OPS26LA063](https://openairdocs.org/ntsb/OPS26LA063.md): Sikorsky VH3D · Washington, DC · Incident · Class 3 · Limited · Preliminary report · Aug 4, 2026 · MILITARY - VM1 · 2 aircraft · No damage
  > On August 4, 2026, about 1434 eastern daylight time (EDT), Marine One (VM1) a Sikorsky VH-3D, and Envoy Air flight 3742 (ENY3742), an Embraer E-170, were involved in a loss of separation about 2 miles north of Ronald Reagan Washington National Airport (DCA),…
- [NTSB OPS25LA034](https://openairdocs.org/ntsb/OPS25LA034.md): Embraer ERJ 170-100 LR · Washington, DC · Incident · Class 3 · Limited · Preliminary report · May 1, 2025 · N879RW · 2 aircraft · No damage
  > On May 1, 2025, about 1433 eastern daylight time (EDT), Priority Air Transport flight 23 (PAT23), (tail number forthcoming), a UH-60 Blackhawk helicopter landing at the Pentagon Heliport (JPN), and Republic Airways flight 5825 (RPA5825), an Embraer 170,…

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'DC' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '260' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/260/sequence?state=DC

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