# NTSB investigations: Hiller UH-12E, 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 CHI98LA012](https://openairdocs.org/ntsb/CHI98LA012.md): Hiller UH-12E · Liberty, NE · Accident · No injuries · Limited investigation · Final report · Oct 9, 1997 · N4027L · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB NYC97LA101](https://openairdocs.org/ntsb/NYC97LA101.md): Hiller UH-12E · Granby, NY · Accident · Serious injuries · Limited investigation · Final report · May 29, 1997 · N4029S · Substantial damage
  > failure of the pilot/owner to replace the torsional clutch as specified by the manufacturer, and subsequent failure of the helicopter's clutch, which resulted in a forced landing (autorotation). A related factor was: the encounter with trees in the emergency…
- [NTSB SEA97LA117](https://openairdocs.org/ntsb/SEA97LA117.md): Hiller UH-12E · Miltonfreewater, OR · Accident · 1 fatal · Limited investigation · Final report · May 21, 1997 · N3005J · Substantial damage
  > The main rotor blade separated due to fatigue. Factors were: an Airworthiness Directive was not properly performed, and inadequate inspection of the main rotor blades.
- [NTSB LAX97LA179](https://openairdocs.org/ntsb/LAX97LA179.md): Hiller UH-12E · Truckee, CA · Accident · Serious injuries · Limited investigation · Final report · May 14, 1997 · N7082D · Substantial damage
  > A loss of engine power for undetermined reasons. A factor in the accident was the unsuccessful attempt to release the long line from the belly hook after it became entangled in a tree.
- [NTSB FTW97LA131](https://openairdocs.org/ntsb/FTW97LA131.md): Hiller UH-12E · Donna, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 19, 1997 · N136HA · Substantial damage
  > The pilot's failure to maintain clearance with the power lines during an aerial application flight. A factor was the power lines.
- [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.

## 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.aircraft_model_code IN ('4360122', '4360137'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4360122&year=1997

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