# NTSB investigations: Allison 250 SER 250HP, 1988

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 LAX88LA325](https://openairdocs.org/ntsb/LAX88LA325.md): Bell 206L · Lihue, HI · Accident · No injuries · Limited investigation · Final report · Sep 17, 1988 · N278KA · Substantial damage
  > During a local sightseeing flight, the pilot reported that while on final approach for landing, the audio and light for low RPM sounded and illuminated. The helicopter was autorotated. It initially bounced when it touched down, then landed hard. The engine…
- [NTSB LAX88LA304](https://openairdocs.org/ntsb/LAX88LA304.md): Bell 206L-1 · Barrett Junct., CA · Accident · Serious injuries · Limited investigation · Final report · Aug 31, 1988 · N74WH · Substantial damage
  > While descending into a canyon, the aircraft struck powerlines, went into an uncontrolled descent and collided with the terrain. The pilot stated that he could not see the powerlines and that his visibility was restricted by the sun. All four passengers…
- [NTSB MIA88FA257](https://openairdocs.org/ntsb/MIA88FA257.md): Hughes 500 · Riviera Beach, FL · Accident · Serious injuries · Field investigation · Final report · Aug 19, 1988 · N3766Z · Substantial damage
  > The traffic watch helicopter was cruising northbound along the interstate at 450 ft AGL & 85 KTS airspeed. A grinding noise was heard & the tail rotor separated from the acft. The acft began an uncommanded right turn which was arrested in about 1/4 turn. The…
- [NTSB ANC88LA086](https://openairdocs.org/ntsb/ANC88LA086.md): Hughes 369D · Kitoi Bay, AK · Accident · No injuries · Limited investigation · Final report · Jul 9, 1988 · N1089D · Substantial damage
  > The helicopter landed with the left skid against a survey stake which protruded from the ground about 6 inches. Upon liftoff the skid did not clear the metal stake before the helicopter started moving laterally to the left. The left skid remained against the…
- [NTSB FTW88LA082](https://openairdocs.org/ntsb/FTW88LA082.md): Sikorsky S-76A · Offshore Oil · Accident · Serious injuries · Limited investigation · Final report · Mar 24, 1988 · N1547N · No damage
  > After landing on the platform, the copilot moved the power levers to flight idle and set the main rotor blade tip path plane to the height normally used. When an enplanning passenger came up the stairs onto the platform, he was struck on the head by the main…
- [NTSB SEA88FA050](https://openairdocs.org/ntsb/SEA88FA050.md): Bell 206A · Roseburg, OR · Accident · Serious injuries · Field investigation · Final report · Feb 18, 1988 · N7981J · Substantial damage
  > While hovering at 200' AGL, the eng lost power & the plt entered an autorotation. He maneuvered to avoid trees & landed amid tree stumps in a logging clear cut area. An investigation revealed the 1st stage turbine wheel had failed. The wheel exited the eng &…

## 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") = 1988
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03002', '03003'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03002&year=1988

---
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.