# NTSB investigations: Hiller UH-12B: Airframe/component/system failure/malfunction

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 MIA00LA111](https://openairdocs.org/ntsb/MIA00LA111.md): Hiller UH-12B · Sanford, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 17, 2000 · N5304V · Substantial damage
  > The pilot's improper collective and cyclic control usage during an emergency descent, following the onset of a 1 to 1 vibration for undetermined reasons, resulting in the helicopter landing hard and rolling over.
- [NTSB ATL88LA030](https://openairdocs.org/ntsb/ATL88LA030.md): Hiller UH-12B · Newnan, GA · Accident · No injuries · Limited investigation · Final report · Nov 7, 1987 · N922TE · Substantial damage
  > The tail rotor 90 degree gearbox mounting flange fractured during apch to land, while the helicopter was at about 75 ft AGL. The gearbox subsequently separated from the helicopter. The plt initiated an autorotation. The helicopter rolled over on ldg.…
- [NTSB CHI87LA045](https://openairdocs.org/ntsb/CHI87LA045.md): Hiller UH-12B · Capac, MI · Accident · No injuries · Limited investigation · Final report · Nov 29, 1986 · N48209 · Substantial damage
  > Ten minutes after takeoff and just prior to letdown from 350 feet AGL a main rotor blade drag strut failed due to progressive fatigue through a threaded portion of the strut. Only partial control of the helicopter was possible after the failure. The pilot…

## 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 ('4360110')
    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" = 130))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4360110&occurrence=130

---
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.