# NTSB investigations: Hiller UH-12E: In flight collision with terrain/water

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 ANC07LA062](https://openairdocs.org/ntsb/ANC07LA062.md): Hiller UH-12E · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jul 10, 2007 · N146ET · Substantial damage
  > The pilot's failure to maintain clearance from a glacier, which resulted in a tail rotor strike during landing, and damage to the helicopter during an emergency descent/landing on rough/uneven terrain. Factors contributing to the accident were variable and…
- [NTSB ATL93LA065](https://openairdocs.org/ntsb/ATL93LA065.md): Hiller UH12E · Greeleyville, SC · Accident · No injuries · Limited investigation · Final report · Mar 25, 1993 · N4029Z · Substantial damage
  > The pilot's misjudgment of the helicopter's altitude during the landing flare.
- [NTSB DEN89DTM02](https://openairdocs.org/ntsb/DEN89DTM02.md): Hiller UH-12E · Mack, CO · Accident · Serious injuries · Final report · May 13, 1989 · N5594N · Substantial damage
  > The pilot's failure to maintain proper altitude during a swath run.
- [NTSB SEA85LA126](https://openairdocs.org/ntsb/SEA85LA126.md): Hiller UH-12E · Athena, OR · Accident · No injuries · Limited investigation · Final report · May 31, 1985 · N37HS · Destroyed
  > The acft settled back to the ground shortly after takeoff before achieving translatioanal lift. The plt was attempting to test a new spray unit that had been installed. He had put 80 gallons of water in the spray tanks.
- [NTSB LAX85LA002](https://openairdocs.org/ntsb/LAX85LA002.md): Hiller UH-12E · Firebaugh, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1984 · N161HA · Substantial damage
  > The acft collided with terrain while on an aerial application flt. The plt stated he, 'heard a loud bang' while spraying. Then the 'nose of the helicopter dove radically down', and he crashed into the field. Examination of the site revealed that one of the…
- [NTSB MKC84LA153](https://openairdocs.org/ntsb/MKC84LA153.md): Hiller 12E · Bedford, IA · Accident · Minor injuries · Limited investigation · Final report · May 29, 1984 · N2726C · Substantial damage
  > The plt had made two swath runs & was descending to begin the third. He stated that the turn was downwind & as he approached the level-off altitude he encountered a downdraft. The acft impacted the ground & rolled over. The plt also stated that the downdraft…

## 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 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')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 230))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4360122&occurrence=230

---
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.