# NTSB investigations: Allison 250 SER 400HP, 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 LAX98LA053](https://openairdocs.org/ntsb/LAX98LA053.md): McDonnell Douglas 369HS · Saipan, India · Accident · Minor injuries · Limited investigation · Final report · Dec 6, 1997 · N9068F · Destroyed
  > The failure of the maintenance facility to comply with the service bulletins, which resulted in the development of a corrosion pit, subsequent leakage and failure of the acceleration bellows of the fuel control.
- [NTSB ANC98TA011](https://openairdocs.org/ntsb/ANC98TA011.md): Bell 206B · Anchorage, AK · Accident · No injuries · Final report · Dec 5, 1997 · N83146 · Substantial damage
  > The pilot's failure to maintain adequate rotor RPM during an autorotation landing.
- [NTSB ANC98LA003](https://openairdocs.org/ntsb/ANC98LA003.md): Bell 206-B2 · Sutton, AK · Accident · No injuries · Limited investigation · Final report · Oct 15, 1997 · N86TA · Substantial damage
  > The pilot's failure to maintain clearance between the tail rotor and the external long line cable, and the subsequent entanglement of the tail rotor with the long line.
- [NTSB IAD98FA005](https://openairdocs.org/ntsb/IAD98FA005.md): Bell 206B · Sago, WV · Accident · 4 fatal · Field investigation · Final report · Oct 12, 1997 · N911RH · Destroyed
  > The improper overhaul of the turbine governor by the manufacturer, which resulted in the loss of power.
- [NTSB FTW97LA364](https://openairdocs.org/ntsb/FTW97LA364.md): Bell 206B2 · Anahuac, TX · Accident · Serious injuries · Limited investigation · Final report · Sep 25, 1997 · N59396 · Destroyed
  > the pilot's inability to maintain control of the helicopter after encountering a dynamic rollover due to entanglement of the external load cable with the left landing gear skid.
- [NTSB LAX97LA317](https://openairdocs.org/ntsb/LAX97LA317.md): Bell 206B · Napa, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 8, 1997 · N770GG · Substantial damage
  > Failure of the pilot to perform an adequate preflight, which resulted in him failing to notice and release the tie down chains.
- [NTSB SEA97LA118](https://openairdocs.org/ntsb/SEA97LA118.md): Hughes 369D · Moclips, WA · Accident · No injuries · Limited investigation · Final report · May 21, 1997 · N8306F · Substantial damage
  > Inadequate installation of the fuel control by company maintenance personnel and a loose nut on a line. A disconnected Pc line was a factor.

## 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 ('03013', '03012'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03013&year=1997

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