# NTSB investigations, 2011: Midair collision

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 ERA12WA089](https://openairdocs.org/ntsb/ERA12WA089.md): Piper PA-28-236 · Mercedes, Argentina · Accident · 2 fatal · Foreign investigation · Nov 21, 2011 · PG-449 · 2 aircraft · Minor damage
  > On November 21, 2011, about 1320 coordinated universal time, a Piper PA-28-236, Argentine Air Force designation PF-449, and a Cessna 152, Argentine registration LV-OOF, collided while on approach to Mercedes Airfield (MRD), Mercedes, Buenos Aires Province,…
- [NTSB WPR12FA020](https://openairdocs.org/ntsb/WPR12FA020.md): Piper PA-44-180 · St. Paul, OR · Accident · 1 fatal · Field investigation · Final report · Oct 25, 2011 · N3062H · 2 aircraft · Substantial damage
  > The pilot was unable to see the other aircraft to avoid a collision.
- [NTSB WPR12CA005](https://openairdocs.org/ntsb/WPR12CA005.md): Combs Dale B RV-4 · Madera, CA · Accident · No injuries · Data collection · Final report · Oct 11, 2011 · N506DC · 2 aircraft · Substantial damage
  > The third airplane pilot’s failure to maintain visual contact with the second airplane during the formation flight.
- [NTSB ANC11FA091](https://openairdocs.org/ntsb/ANC11FA091.md): Cessna 208B · Nightmute, AK · Accident · 1 fatal · Field investigation · Final report · Sep 2, 2011 · N207DR · 2 aircraft · Destroyed
  > The failure of the pilot of the other airplane to maintain adequate clearance while performing an unexpected and unannounced abrupt maneuver, resulting in a midair collision between the two airplanes.
- [NTSB ERA11FA468](https://openairdocs.org/ntsb/ERA11FA468.md): Mitchell David N Lancair IV P · Hammonton, NJ · Accident · 1 fatal · Field investigation · Final report · Aug 20, 2011 · N71DM · 2 aircraft · Substantial damage
  > The Lancair pilot's failure to see and avoid the aerobatic airplane. Contributing to the accident was the Lancair pilot's inadequate use of collision avoidance strategies while inbound to an area of known potential aerobatic activity.
- [NTSB CEN11LA573](https://openairdocs.org/ntsb/CEN11LA573.md): Stevens R P/Mccright D W Vans RV-6 · Conroe, TX · Accident · 1 fatal · Limited investigation · Final report · Aug 13, 2011 · N16DD · 2 aircraft · Substantial damage
  > The failure of the pilot of the RV-6 airplane to maintain clearance from the RV-8 airplane while practicing formation flight.
- [NTSB ANC11FA071](https://openairdocs.org/ntsb/ANC11FA071.md): Cessna U206G · Talkeetna, AK · Accident · 4 fatal · Field investigation · Final report · Jul 30, 2011 · N756MP · 2 aircraft · Minor damage
  > The inadequate visual lookout and failure to see and avoid by the pilots of both airplanes while maneuvering to land, which resulted in a midair collision. Contributing to the accident was the lack of standardized, unequivocal procedures concerning common…
- [NTSB ANC11FA062](https://openairdocs.org/ntsb/ANC11FA062.md): Cessna U206 · Port Alsworth, AK · Accident · No injuries · Field investigation · Final report · Jul 10, 2011 · N2186F · 2 aircraft · Minor damage
  > The pilot’s failure to see and avoid the approaching airplane. Contributing to the accident was that the pilot’s failure to listen to radio position reports from the other airplane on the common traffic advisory frequency and the absence of any forward-facing…
- [NTSB CEN11WA458](https://openairdocs.org/ntsb/CEN11WA458.md): Vans RV6 · Shoreham, United Kingdom · Accident · 1 fatal · Foreign investigation · Jul 4, 2011 · G-RVGC · 2 aircraft · Destroyed
  > On July 4, 2011, at 1528 Universal Coordinated Time (UTC), a Vans RV-6A single-engine airplane, G-RVCG, and a Diamond DA-40 single-engine airplane, G-CEZR, collided in midair while maneuvering near Shoreham, West Sussex, United Kingdom. G-RVGC was destroyed…
- [NTSB ERA11FA291](https://openairdocs.org/ntsb/ERA11FA291.md): Piper PA-28-180 · New Hampton, NY · Accident · 2 fatal · Field investigation · Final report · May 9, 2011 · N5275L · 2 aircraft · Substantial damage
  > The PA24 pilot’s failure to maintain adequate clearance from the PA28, resulting in an in-flight collision. Contributing to the accident was the PA24 pilot's decision to overtake the PA28.
- [NTSB CEN11LA296](https://openairdocs.org/ntsb/CEN11LA296.md): Air Tractor AT-802A · New Madrid, MO · Accident · Serious injuries · Limited investigation · Final report · Apr 19, 2011 · N802KC · 2 aircraft · Substantial damage
  > The failure of both pilots to see and avoid the other airplane, which resulted in a midair collision.

## 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 year(c."eventDate") = 2011
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '250' 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/250/sequence?year=2011

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