# NTSB investigations: Allison 250-C20 series, 1997

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 SEA98LA024](https://openairdocs.org/ntsb/SEA98LA024.md): Bell 206L · Idaho Falls, ID · Accident · No injuries · Limited investigation · Final report · Dec 16, 1997 · N206LT · Substantial damage
  > loss of engine power for undetermined reason(s). A factor relating to the accident included a dirt berm/ridge in the field where the pilot executed the forced landing.
- [NTSB FTW97FA352](https://openairdocs.org/ntsb/FTW97FA352.md): Bell 407 · Grand Isle S108 · Accident · Minor injuries · Field investigation · Final report · Sep 18, 1997 · N467PH · Substantial damage
  > The tail rotor blade strike(s) that severed the aft portion of the tailboom, subsequently rendering the pilot with no tail rotor control while in cruise flight. A factor was the lack of suitable terrain for the forced autorotative landing.
- [NTSB ANC97GA126](https://openairdocs.org/ntsb/ANC97GA126.md): Bell BH-206B · Dillingham, AK · Accident · 1 fatal · Final report · Aug 21, 1997 · N18FH · Destroyed
  > The pilot's intentional VFR flight into instrument meteorological conditions (IMC). Factors associated with the accident are the pilot's failure to activate the cabin heating system, the lack of an operable windshield defogger, the pilot's overconfidence in…
- [NTSB FTW97LA252](https://openairdocs.org/ntsb/FTW97LA252.md): Bell 206B · New Iberia, LA · Accident · Serious injuries · Limited investigation · Final report · Jul 3, 1997 · N49661 · Substantial damage
  > the pilot's improper in-flight planning/decision. A related factor was his failure to follow the company procedure of maintaining visual contact with the external long-line cable, while hovering with it attached.
- [NTSB ATL97LA086](https://openairdocs.org/ntsb/ATL97LA086.md): McDonnell Douglas MDHC-369E · Okahumpka, FL · Accident · Serious injuries · Limited investigation · Final report · Jun 13, 1997 · N765KV · No damage
  > The failure of the crewmember to use the necessary safety equipment, and his subsequent fall from an elevated platform. A factor was the crewmember's distraction with an animal.
- [NTSB SEA97LA072](https://openairdocs.org/ntsb/SEA97LA072.md): Hiller UH-12E · Glide, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 14, 1997 · N545HA · Substantial damage
  > failure of the pilot to maintain clearance from a power transmission line. Factors relating to the accident included ambient light conditions, which made the power line hard to see.
- [NTSB FTW97FA121](https://openairdocs.org/ntsb/FTW97FA121.md): MBB BO-105S · Lena, LA · Accident · 1 fatal · Field investigation · Final report · Mar 14, 1997 · N7161J · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions, and his subsequent loss of aircraft control due to spatial disorientation. Factors were the pilot not following company procedures and directives, the low ceiling, and the dark night…
- [NTSB LAX97LA120](https://openairdocs.org/ntsb/LAX97LA120.md): McDonnell Douglas MD 369HS · Pacific Ocean (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Mar 11, 1997 · N95MS · Destroyed
  > A loss of engine power due to a deteriorated compressor air seal, which resulted from inadequate maintenance inspection of the helicopter to detect corrosion in the compressor case while being operated in a marine environment.
- [NTSB LAX97GA105](https://openairdocs.org/ntsb/LAX97GA105.md): McDonnell Douglas 369D · Santee, CA · Accident · 1 fatal · Final report · Feb 17, 1997 · N5200Y · Substantial damage
  > Spatial disorientation and temporary visual impairment that led to a loss of aircraft control as result of difficulty to light adaptivity. Contributing was the crew coordination and inadequate night flight recurrency training.
- [NTSB NYC97LA041](https://openairdocs.org/ntsb/NYC97LA041.md): Bell 206A · Linden, NJ · Accident · No injuries · Limited investigation · Final report · Jan 3, 1997 · N555SJ · Substantial damage
  > the pilot allowing the rotor RPM to decay and his failure to take remedial action in time to recover the autorotation.

## 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") = 1997
  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=1997

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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.