# NTSB investigations: AS+ AC 4

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 CEN17LA181](https://openairdocs.org/ntsb/CEN17LA181.md): AS+ AC 4 · Blair, NE · Accident · 1 fatal · Limited investigation · Final report · May 13, 2017 · N358R · Substantial damage
  > The pilot's loss of control due to his diverted attention as he attempted to close the canopy that opened during initial climb.
- [NTSB LAX05LA239](https://openairdocs.org/ntsb/LAX05LA239.md): As+ AC4 · Sparks, NV · Accident · 1 fatal · Limited investigation · Final report · Jul 19, 2005 · N9276Y · Destroyed
  > the pilot's failure to maintain an adequate airspeed while performing S-turns on final approach, which resulted in a stall and uncontrolled descent into terrain. A contributing factor in the accident was the pilot's impairment due to ingestion of an…
- [NTSB SEA05LA114](https://openairdocs.org/ntsb/SEA05LA114.md): Avia Stroitel AC-4B · Wenatchee, WA · Accident · 1 fatal · Limited investigation · Final report · Jun 11, 2005 · N1198Z · Destroyed
  > The pilot's failure to maintain terrain clearance for undetermined reasons.
- [NTSB CHI01LA332](https://openairdocs.org/ntsb/CHI01LA332.md): AviaStrottel AC 4C · Marshfield, MI · Accident · Serious injuries · Limited investigation · Final report · Sep 29, 2001 · N68PR · Minor damage
  > The pilot's decision to release from the tow plane during the takeoff. A factor associated with the accident was the pilot's vision was restricted by his hat during the takeoff.
- [NTSB FTW98LA223](https://openairdocs.org/ntsb/FTW98LA223.md): AS+ AC-4 · Cedar Fort, UT · Accident · Serious injuries · Limited investigation · Final report · May 16, 1998 · N158R · Destroyed
  > Failure by the pilot to maintain control of the aircraft. A factor was lack of experience in make and model.
- [NTSB FTW97LA349](https://openairdocs.org/ntsb/FTW97LA349.md): AS+ AC-4B · Sundance, WY · Accident · No injuries · Limited investigation · Final report · Sep 14, 1997 · N3021 · Substantial damage
  > improper planning/decision by the pilot, which led to a snag and sudden slack in the tow rope, and necessitated an aborted launch (emergency landing) after initial liftoff. This in turn led to an inadvertent stall, a wing drop, and the left wing tip dragging…
- [NTSB CHI96LA165](https://openairdocs.org/ntsb/CHI96LA165.md): AS+ AC 4 · Hartford, WI · Accident · Serious injuries · Limited investigation · Final report · May 18, 1996 · N29HS · Substantial damage
  > lack of airspeed control by the pilot, while maneuvering.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('05628R1'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=05628R1

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.