# NTSB investigations: Lycoming VO-540 series, 1993

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 MIA94LA029](https://openairdocs.org/ntsb/MIA94LA029.md): Hiller UH-12E · Moore Haven, FL · Accident · Minor injuries · Limited investigation · Final report · Nov 26, 1993 · N130HA · Substantial damage
  > Failure of the pilot-in-command to maintain aircraft control following loss of engine power for undetermined reasons.
- [NTSB LAX94LA043](https://openairdocs.org/ntsb/LAX94LA043.md): Hiller UH-12E · Salinas, CA · Accident · No injuries · Limited investigation · Final report · Nov 13, 1993 · N149HA · Destroyed
  > The pilot's improper handling of the helicopter which resulted in overloading of the rotor system in a maneuvering turn during aerial application of chemical, and subsequent failure of the main rotor paddle assembly.
- [NTSB CHI94LA022](https://openairdocs.org/ntsb/CHI94LA022.md): Hiller UH12E · Sioux Rapids, IA · Accident · No injuries · Limited investigation · Final report · Oct 22, 1993 · N4026S · Destroyed
  > the Pilot in Command failed to maintain clearance with the terrain while proceeding up an upslope.
- [NTSB SEA93LA181](https://openairdocs.org/ntsb/SEA93LA181.md): Hiller UH-12E · Auburn, WA · Accident · No injuries · Limited investigation · Final report · Aug 23, 1993 · N9785C · Substantial damage
  > Failure of the connecting rod bolt. The high vegetation was a factor.
- [NTSB ATL93LA065](https://openairdocs.org/ntsb/ATL93LA065.md): Hiller UH12E · Greeleyville, SC · Accident · No injuries · Limited investigation · Final report · Mar 25, 1993 · N4029Z · Substantial damage
  > The pilot's misjudgment of the helicopter's altitude during the landing flare.
- [NTSB LAX93LA166](https://openairdocs.org/ntsb/LAX93LA166.md): Bell 47G2A · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Limited investigation · Final report · Mar 24, 1993 · N8493E · Minor damage
  > The passenger's failure to adhere to the pilot's instructions. Factors which contributed to the accident were: the language/communications difficulty between the pilot & the passenger, and the bird strike.
- [NTSB LAX93LA120](https://openairdocs.org/ntsb/LAX93LA120.md): Bell 47G · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Feb 13, 1993 · N1185W · Substantial damage
  > The clutch slippage and failure of the pilot to jettison the load.

## 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") = 1993
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41534', '41582'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41534&year=1993

---
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.