# NTSB investigations: Allison 250-C20 series, 2018

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 CEN19FA020](https://openairdocs.org/ntsb/CEN19FA020.md): Hughes 369 · McDougal, AR · Accident · 1 fatal · Class 2 · Field · Final report · Nov 2, 2018 · N5187S · Destroyed
  > The pilot's failure to maintain the helicopter's clearance from the powerline structure while hovering in gusty wind conditions, which resulted in an inadvertent collision with the structure and an uncontrolled descent into terrain.
- [NTSB ERA19FA035](https://openairdocs.org/ntsb/ERA19FA035.md): Aerospatiale AS 355F2 · Beekmantown, NY · Accident · 2 fatal · Field investigation · Final report · Oct 30, 2018 · N372CA · Destroyed
  > The pilot's failure to keep the helicopter clear of a utility pole while hovering with a tailwind, which resulted in a dynamic rollover into active power lines.
- [NTSB CEN18LA365](https://openairdocs.org/ntsb/CEN18LA365.md): MD Helicopters MD-369 · Orchard Lake, MI · Accident · Serious injuries · Limited investigation · Final report · Sep 3, 2018 · N1601Y · Substantial damage
  > The pilot's failure to maintain helicopter control and terrain clearance while in a hover after performing an evasive maneuver to avoid wildlife.
- [NTSB GAA18CA512](https://openairdocs.org/ntsb/GAA18CA512.md): Bell 206 · Battle Mountain, NV · Accident · No injuries · Class 4 · Data collection · Final report · Aug 18, 2018 · N8052G · Destroyed
  > The pilot's failure to maintain the proper altitude and airspeed while flying in a canyon in gusting wind conditions.
- [NTSB WPR18LA226](https://openairdocs.org/ntsb/WPR18LA226.md): Hughes 369 · Riverside, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 17, 2018 · N105JL · Substantial damage
  > The instructor’s delayed remedial action to an excessive descent rate during a simulated autorotation, which resulted in a hard landing.
- [NTSB ERA18LA183](https://openairdocs.org/ntsb/ERA18LA183.md): Bell 206 · Rio Grande, PR · Accident · 1 fatal · Limited investigation · Final report · Jun 30, 2018 · N10CV · Substantial damage
  > A total loss of engine power due to oil exhaustion, which resulted in an uncontrolled descent and hard landing.
- [NTSB WPR18LA164](https://openairdocs.org/ntsb/WPR18LA164.md): Bell 206 · Sanders, KY · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 5, 2018 · N518Z · Substantial damage
  > A partial loss of engine power for undetermined reasons, and a loss of main rotor rpm during the subsequent autorotation, which resulted in a hard landing.
- [NTSB GAA18CA117](https://openairdocs.org/ntsb/GAA18CA117.md): Hughes Helicopters 369 · Wrightwood, CA · Accident · No injuries · Data collection · Final report · Feb 1, 2018 · N618SG · Substantial damage
  > The pilot’s high altitude, high gross weight landing with insufficient tail rotor thrust resulting in a loss of tail rotor effectiveness.
- [NTSB WPR18FA074](https://openairdocs.org/ntsb/WPR18FA074.md): Hughes 369D · Pomeroy, WA · Accident · 1 fatal · Field investigation · Final report · Jan 27, 2018 · N369TH · Substantial damage
  > A loss of control following the gunner's failure to ensure that the net maintained clearance from the tail rotor.
- [NTSB ERA18LA091](https://openairdocs.org/ntsb/ERA18LA091.md): Hughes 369 · San Juan, PR · Accident · Serious injuries · Limited investigation · Final report · Jan 11, 2018 · N571HH · No damage
  > The helicopter pilot's improper decision to use an open-end grapple, instead of an A-frame attachment, to lift and move a ladder with a lineman on it and the lineman's improper decision to be lifted on a ladder via an open-end grapple, which were contrary to…

## 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") = 2018
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=2018

---
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.