# NTSB investigations, 2009: 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 CEN10LA068](https://openairdocs.org/ntsb/CEN10LA068.md): Beech V35 · Dodge City, KS · Accident · No injuries · Limited investigation · Final report · Dec 6, 2009 · N108L · Substantial damage
  > The failure of the pitot heat system in icing conditions resulting in an inoperative airspeed indicator which led to an inadvertant stall while on final approach. Contributing to the accident was the pilot's decision to fly into known icing conditions.
- [NTSB WPR09LA263](https://openairdocs.org/ntsb/WPR09LA263.md): Lanham Lancair IV · Seligman, AZ · Accident · 2 fatal · Limited investigation · Final report · May 23, 2009 · N144L · Substantial damage
  > The pilot's loss of airplane control during en route descent while operating in known icing conditions.
- [NTSB ANC09LA038](https://openairdocs.org/ntsb/ANC09LA038.md): Cessna TU206 · Bethel, AK · Accident · Minor injuries · Limited investigation · Final report · May 6, 2009 · N629SP · Substantial damage
  > The pilot’s failure to remove visible frost from the wings during the preflight inspection, and his failure to maintain adequate airspeed to avoid a stall. Contributing to the accident were conditions conducive to structural icing/frost.
- [NTSB CEN09LA206](https://openairdocs.org/ntsb/CEN09LA206.md): Cessna 402B · Aberdeen, SD · Accident · No injuries · Limited investigation · Final report · Mar 10, 2009 · N402BP · Substantial damage
  > The pilot's continued flight into adverse weather and icing conditions, and his failure to maintain aircraft control resulting in a hard landing. Contributing to the accident was the accumulation of airframe ice and the strong, gusting crosswinds.
- [NTSB CEN09CA136](https://openairdocs.org/ntsb/CEN09CA136.md): Beech 19 · Lafayette, IN · Accident · No injuries · Data collection · Final report · Jan 18, 2009 · N6509T · Substantial damage
  > The pilot's inadvertent encounter with icing conditions during initial climb. Contributing to the accident were the lack of visibility during the landing due to an ice covered windscreen, and the structural ice that adversely affected the flight…
- [NTSB CEN09FA135](https://openairdocs.org/ntsb/CEN09FA135.md): Gulfstream Aerospace Commander · Wray, CO · Accident · 3 fatal · Field investigation · Final report · Jan 15, 2009 · N840NK · Destroyed
  > The pilot’s failure to maintain aircraft control during the approach resulting in an aerodynamic stall and subsequent impact with terrain. Contributing to the accident was the pilot’s improper preflight planning and conditions conducive for structural icing.
- [NTSB CEN09LA122](https://openairdocs.org/ntsb/CEN09LA122.md): Beech A36TC · Three Rivers, MI · Accident · No injuries · Limited investigation · Final report · Jan 6, 2009 · N92WT · Substantial damage
  > The pilot's decision to continue the flight into an area with conditions that were conducive to icing and the loss of engine power due to induction icing.

## 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") = 2009
  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=2009

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