# NTSB investigations: Pratt & Whitney R-985 series: Aerodynamic stall/spin

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 WPR24FA196](https://openairdocs.org/ntsb/WPR24FA196.md): Lockheed 12A · Chino, CA · Accident · 2 fatal · Class 3 · Field · Final report · Jun 15, 2024 · N93R · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack during the initial climb, which resulted in an aerodynamic stall at an altitude insufficient for recovery. Contributing to the accident was the pilot’s failure to ensure that the airplane was…
- [NTSB ANC22LA063](https://openairdocs.org/ntsb/ANC22LA063.md): De Havilland DHC2 · Anchorage, AK · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 26, 2022 · N9776R · Substantial damage
  > The pilot’s failure to maintain directional control during takeoff in gusting wind conditions which resulted in the wing exceeding its critical angle of attack, a loss of control and impact with the water.
- [NTSB CEN19FA278](https://openairdocs.org/ntsb/CEN19FA278.md): Grumman G164 · Hays, KS · Accident · 1 fatal · Field investigation · Final report · Aug 20, 2019 · N3631Z · Destroyed
  > The pilot's exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall.
- [NTSB ANC18FA055](https://openairdocs.org/ntsb/ANC18FA055.md): De Havilland DHC-2 · Willow, AK · Accident · 1 fatal · Class 2 · Field · Final report · Jul 19, 2018 · N9878R · Destroyed
  > The pilot's exceedance of the airplane's critical angle of attack during departure climb, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's improper decision to load the airplane beyond its allowable gross weight and center…
- [NTSB ERA14LA321](https://openairdocs.org/ntsb/ERA14LA321.md): Grumman Acft ENG Cor-Schweizer G 164B · Farmington, DE · Accident · Minor injuries · Limited investigation · Final report · Jun 18, 2014 · N891JC · Substantial damage
  > The pilot's inadequate preflight planning for a takeoff in high-density altitude conditions and his decision to reduce power during the initial climb, which led to the airplane exceeding its critical angle-of-attack and experiencing an aerodynamic stall.
- [NTSB CEN12FA534](https://openairdocs.org/ntsb/CEN12FA534.md): Beech G18 - S · Taylorville, IL · Accident · 1 fatal · Field investigation · Final report · Aug 11, 2012 · N697Q · Substantial damage
  > The pilot's failure to maintain adequate airspeed and use the appropriate flaps setting during sport-parachuting operations, which resulted in an aerodynamic stall/spin and a subsequent loss of control. Contributing to the accident was the pilot’s failure to…
- [NTSB CEN11LA396](https://openairdocs.org/ntsb/CEN11LA396.md): Grumman G164 · Oak Ridge, LA · Accident · Minor injuries · Limited investigation · Final report · May 27, 2011 · N2LU · Substantial damage
  > The flight instructor's failure to maintain adequate airspeed, which resulted in an aerodynamic stall and subsequent impact with trees.
- [NTSB LAX08LA193](https://openairdocs.org/ntsb/LAX08LA193.md): Snow S2C · Glenn's Ferry, ID · Accident · 1 fatal · Limited investigation · Final report · Jun 24, 2008 · N1661S · Substantial damage
  > Failure of the pilot to maintain an adequate airspeed resulting in an aerodynamic stall/spin while maneuvering.
- [NTSB DEN08LA106](https://openairdocs.org/ntsb/DEN08LA106.md): Grumman-Schweizer G-164B · O'Kean, AR · Accident · Serious injuries · Limited investigation · Final report · Jun 18, 2008 · N6601Q · Destroyed
  > An inadvertent accelerated stall. Contributing factors in this accident were the low airspeed, steep angle of bank, and heavy weight.

## 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.engine_model_code IN ('52008')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '241'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/241/cases?engine=52008

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