# NTSB investigations: Allison 250 SER 400HP, 1986

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 FTW87LA016](https://openairdocs.org/ntsb/FTW87LA016.md): Bell 206L · Galveston, TX · Accident · Minor injuries · Limited investigation · Final report · Nov 11, 1986 · N16772 · Substantial damage
  > The plt was attempting to hover in a tailwind of 35 KTS which exceeded the acft manufacturers performance limitiations for operations in allowable relative wind. The plt lost control of the acft on lift-off. The acft rolled over and came to rest on its right…
- [NTSB FTW86LA130](https://openairdocs.org/ntsb/FTW86LA130.md): Bell 206B · Conroe, TX · Accident · Serious injuries · Limited investigation · Final report · Jul 15, 1986 · N352AT · Substantial damage
  > The pilot reported that he lost tail rotor control during the transition part of the takeoff. As the helicopter rotated to the right, the pilot reduced power and pulled in collective before impact. Examination of the tail rotor showed no evidence of any tail…
- [NTSB LAX86FJA02](https://openairdocs.org/ntsb/LAX86FJA02.md): Bell 206B · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Final report · Jul 7, 1986 · N4835A · Destroyed
  > The plt was attempting to take off from the deck of a tuna boat when it contacted the side of the boat and sank in the Ocean. Post accident inspection revealed one of two nose tiedown straps had not been removed from the helicopter prior to the takeoff. The…
- [NTSB DEN86LA151](https://openairdocs.org/ntsb/DEN86LA151.md): Bell 206B · Portal, ND · Accident · Minor injuries · Limited investigation · Final report · Jun 4, 1986 · N59495 · Substantial damage
  > The plt reported that the acft hit wires at the end of a swath run. The pitch change link broke when the main rotor contacted the wires and the plt attempted to land. After touchdown, the helicopter rolled onto its side.
- [NTSB FTW86LA041](https://openairdocs.org/ntsb/FTW86LA041.md): Hughes 369D · New Boston, TX · Accident · Minor injuries · Limited investigation · Final report · Mar 7, 1986 · N58420 · Substantial damage
  > The pilot experienced a tail rotor drive shaft flexible coupling failure when he pulled collective pitch to come to a hover before landing. The helicopter entered an uncontrollable right spin. During his haste to get the helicopter on the ground the pilot…

## 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") = 1986
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03013&year=1986

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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.