# NTSB investigations, 2011: Structural icing

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 ANC12CA016](https://openairdocs.org/ntsb/ANC12CA016.md): Cessna 207A · Kwigillingok, AK · Accident · Minor injuries · Data collection · Final report · Dec 21, 2011 · N6480H · Substantial damage
  > The pilot’s decision to continue visual flight into instrument meteorological conditions with moderate icing, which resulted in structural icing and an aerodynamic stall.
- [NTSB ERA12FA115](https://openairdocs.org/ntsb/ERA12FA115.md): Socata TBM 700 · Morristown, NJ · Accident · 5 fatal · Field investigation · Final report · Dec 20, 2011 · N731CA · Destroyed
  > The airplane’s encounter with unforecasted severe icing conditions that were characterized by high ice accretion rates and the pilot's failure to use his command authority to depart the icing conditions in an expeditious manner, which resulted in a loss of…
- [NTSB CEN12CA104](https://openairdocs.org/ntsb/CEN12CA104.md): Cessna 421B · Pampa, TX · Accident · No injuries · Data collection · Final report · Dec 9, 2011 · N421CE · Substantial damage
  > The pilot's inadequate aircraft control during landing, which resulted in a hard landing.
- [NTSB ERA11LA344](https://openairdocs.org/ntsb/ERA11LA344.md): Beech A100 · Gray, TN · Accident · No injuries · Limited investigation · Final report · Jun 15, 2011 · N15L · Substantial damage
  > An encounter with convectively-induced turbulence and icing, which resulted in an in-flight upset and a loss of airplane control.
- [NTSB WPR11FA228](https://openairdocs.org/ntsb/WPR11FA228.md): Bellanca 17-30A · Rock Springs, WY · Accident · 2 fatal · Field investigation · Final report · May 18, 2011 · N93577 · Substantial damage
  > The pilot’s decision to continue flight into an area of known adverse weather, which resulted in an accumulation of structural ice that led to a loss of control and in-flight breakup. Also causal was the pilot’s inadequate preflight weather planning.
- [NTSB ERA11FA182](https://openairdocs.org/ntsb/ERA11FA182.md): Diamond DA-40 · Allagash, ME · Accident · 1 fatal · Field investigation · Final report · Mar 7, 2011 · CGPDO · Substantial damage
  > The pilot's inadvertent encounter with icing conditions, which resulted in an aerodynamic stall and loss of control. Contributing was the pilots’ inadequate preflight weather planning.
- [NTSB CEN11FA144](https://openairdocs.org/ntsb/CEN11FA144.md): Gates Learjet 35A · Springfield, IL · Accident · Minor injuries · Field investigation · Final report · Jan 6, 2011 · N800GP · Substantial damage
  > The pilot’s decision to conduct an instrument approach in icing conditions without the anti-ice system activated, contrary to the airplane flight manual guidance, which resulted in an inadvertent aerodynamic stall due to an in-flight accumulation of airframe…

## 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" = '210' 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/210/sequence?year=2011

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