# NTSB investigations, 2021: Part(s) separation from AC

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 ERA22FA036](https://openairdocs.org/ntsb/ERA22FA036.md): Vans RV4 · Chattahoochee, FL · Accident · 1 fatal · Class 3 · Field · Final report · Oct 31, 2021 · N479JJ · Destroyed
  > The pilot’s failure to properly secure the canopy before takeoff, allowing the canopy to open and then separate in flight, which resulted in the pilot’s failure to maintain control of the airplane for reasons that could not be determined based on the…
- [NTSB CEN22LA004](https://openairdocs.org/ntsb/CEN22LA004.md): Cessna 195 · Watkins, CO · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 4, 2021 · N3027B · Substantial damage
  > The separation of the left main landing gear spring during landing roll due to a preexisting fatigue crack.
- [NTSB ERA21LA385](https://openairdocs.org/ntsb/ERA21LA385.md): Doan Vernon D W10-WITTMAN Tailwind · Brooksville, FL · Accident · No injuries · Class 4 · Limited · Final report · Sep 29, 2021 · N68TW · Substantial damage
  > The failure of the nose landing gear retention bolt during taxi which resulted in a loss of control and subsequent impact with the taxiway.
- [NTSB ERA21LA379](https://openairdocs.org/ntsb/ERA21LA379.md): Hawker Beechcraft 400A · Charleston, SC · Accident · No injuries · Class 3 · Limited · Final report · Sep 14, 2021 · N100FN · Substantial damage
  > The in-flight separation of the left engine’s four-panel cowling for reasons that could not be determined based on the available evidence.
- [NTSB ERA21LA336](https://openairdocs.org/ntsb/ERA21LA336.md): Gulfstream Aerospace G-IV · Fort Lauderdale, FL · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2021 · N277GM · Substantial damage
  > The pilot-in-command’s (PIC) and second-in-command’s (SIC) failure during preflight inspection to ensure that the nose landing gear’s pip pin was properly installed, which resulted in separation of the pip pin during takeoff. Contributing to the accident was…
- [NTSB ERA21FA317](https://openairdocs.org/ntsb/ERA21FA317.md): Rotorway Exec 162F · Argyle, NY · Accident · 2 fatal · Class 3 · Field · Final report · Aug 7, 2021 · N162KJ · Destroyed
  > The pilot’s abrupt control inputs, which resulted in a low G condition, main rotor mast bumping, and the subsequent severing of the tail boom by a main rotor blade.
- [NTSB WPR21LA301](https://openairdocs.org/ntsb/WPR21LA301.md): Piper PA-28-140 · Amado, AZ · Accident · No injuries · Class 3 · Limited · Final report · Aug 2, 2021 · N44245 · Substantial damage
  > The inflight separation of a section of a propeller blade due to a fatigue crack, which resulted in a forced landing.
- [NTSB WPR21FA300](https://openairdocs.org/ntsb/WPR21FA300.md): Robinson Helicopter R66 · Colusa, CA · Accident · 4 fatal · Class 3 · Field · Final report · Aug 1, 2021 · N7000J · Destroyed
  > The pilot’s abrupt flight control input that led to mast bumping and a subsequent in-flight breakup.
- [NTSB CEN21LA450](https://openairdocs.org/ntsb/CEN21LA450.md): Cessna 140 · Caddo Mills, TX · Accident · No injuries · Class 4 · Limited · Final report · Jul 22, 2021 · N84BC · Substantial damage
  > The missing vertical stabilizer hardware, which resulted in a severe uncommanded yawing motion that necessitated an emergency landing, during which the airplane nosed over and sustained substantial damage to the vertical stabilizer.
- [NTSB CEN21LA339](https://openairdocs.org/ntsb/CEN21LA339.md): Robinson Helicopter R44 II · West Liberty, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 20, 2021 · N983HA · Substantial damage
  > The pilot’s failure to see and avoid a wire while maneuvering at low altitude during an aerial application flight, resulting in a collision with the wire.
- [NTSB ENG21WA034](https://openairdocs.org/ntsb/ENG21WA034.md): Cessna P206 · Kamarang, Guyana · Accident · Class 5 · Foreign · Jul 15, 2021 · 8R-DAC · Substantial damage
- [NTSB CEN21FA314](https://openairdocs.org/ntsb/CEN21FA314.md): PZL Mielec M18 · Seiling, OK · Accident · 1 fatal · Class 3 · Field · Final report · Jul 12, 2021 · N9310R · Destroyed
  > The pilot’s in-flight loss of control due to the structural failure of a wing fitting and separation of the outboard wing section. Also causal were the inadequate wing fitting inspections, which failed to detect the initial corrosion and crack before it…
- [NTSB DCA21WA206](https://openairdocs.org/ntsb/DCA21WA206.md): Boeing 777 · Mexico City, Mexico · Incident · Class 5 · Foreign · Jul 4, 2021 · F-GSQI · No damage
- [NTSB ERA21LA269](https://openairdocs.org/ntsb/ERA21LA269.md): Garlick Helicopters OH-58A+ · Alpine, AL · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 25, 2021 · N372NS · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines during a low-level aerial application flight, resulting in main rotor blade impact with a fiber-optic cable, a loss of control, and the helicopter’s subsequent impact with terrain.
- [NTSB ERA21LA246](https://openairdocs.org/ntsb/ERA21LA246.md): Honda HA-420 · Kennesaw, GA · Accident · No injuries · Class 3 · Limited · Final report · Jun 4, 2021 · N10XN · Substantial damage
  > The mechanic’s improper installation of the left main wheel assembly.
- [NTSB ERA21FA233](https://openairdocs.org/ntsb/ERA21FA233.md): Bhi H60 Helicopters UH-60A · Leesburg, FL · Accident · 4 fatal · Class 3 · Field · Final report · May 25, 2021 · N9FH · Destroyed
  > The failure of the water tank snorkel support structure, which allowed the snorkel to contact the main rotor blades. Contributing to the accident was insufficient Federal Aviation Administration oversight of the supplemental type certificate process for the…
- [NTSB ERA21LA223](https://openairdocs.org/ntsb/ERA21LA223.md): Zenith Zodiac 601 XL · McKenzie, TN · Accident · No injuries · Class 3 · Limited · Final report · May 15, 2021 · N493TG · Substantial damage
  > The improper installation and inspection of the propeller, which resulted in an in-flight separation of the propeller assembly.
- [NTSB GAA21WA106](https://openairdocs.org/ntsb/GAA21WA106.md): Edge 540 · Tempsford, United Kingdom · Accident · No injuries · Class 4 · Foreign · May 1, 2021 · G-EDGY · Substantial damage
- [NTSB ERA21FA195](https://openairdocs.org/ntsb/ERA21FA195.md): Bell Helicopter Textron Canada 429 · Eden, NC · Accident · 1 fatal · Class 3 · Field · Final report · Apr 28, 2021 · N53DE · Destroyed
  > The impact of the main rotor blades with the tail boom during low-altitude maneuvers, which severed the tail rotor drive shaft and resulted in a loss of control and impact with terrain.
- [NTSB ERA21LA396](https://openairdocs.org/ntsb/ERA21LA396.md): Sonex Waiex · Doylestown, PA · Accident · No injuries · Class 4 · Limited · Final report · Mar 22, 2021 · N220JD · Substantial damage
  > The pilot’s failure to maintain a proper glidepath during landing. Contributing to the accident was his failure to ensure the canopy locks were properly configured prior to flight.
- [NTSB WPR21LA142](https://openairdocs.org/ntsb/WPR21LA142.md): Davis Dan B Lancair Evolution · Phoenix, AZ · Accident · No injuries · Class 3 · Limited · Final report · Mar 18, 2021 · N469KS · Substantial damage
  > A malfunction of the main cabin door latching mechanism for reasons that could not be determined based on the available information.
- [NTSB ERA21LA155](https://openairdocs.org/ntsb/ERA21LA155.md): Socata MS894A · Monroe, GA · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 15, 2021 · N42BF · Substantial damage
  > Maintenance personnel’s failure to properly inspect and maintain the airplane’s engine cowling latches, which resulted in the in-flight separation of the engine cowling and a subsequent forced landing.
- [NTSB ERA21LA149](https://openairdocs.org/ntsb/ERA21LA149.md): Beech 23 · Rogersville, TN · Accident · No injuries · Class 4 · Limited · Final report · Mar 3, 2021 · N2374J · Substantial damage
  > The pilot's improper landing flare, which resulted in an initial hard landing, separation of the left main landing gear, and a runway excursion during a subsequent landing attempt.
- [NTSB WPR21LA108](https://openairdocs.org/ntsb/WPR21LA108.md): Abbett Gerry Lancair Evolution · Saratoga, WY · Accident · No injuries · Class 3 · Limited · Final report · Feb 8, 2021 · N7569A · Substantial damage
  > A windshield failure during cruise flight due to stress concentrations in the bond area as a result of improper assembly of the windshield.

## 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") = 2021
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '338' 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/338/sequence?year=2021

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