# Accident 19900331007339A: Hiller UH12D, Soddy Daisy, TN, March 31, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: March 31, 1990, 13:38 local time
- Place: Soddy Daisy, TN
- Damage: Substantial damage
- Phase of flight: Pwr On Vertical Ldng/Rtrcrft
- Operating rules: General operating rules (Part 91)
- Location: 35.2607° N, 85.1694° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=35.2607&lon=-85.1694&mi=10
- Aircraft: N94496, a cancelled registration (https://openairdocs.org/deregistered/N94496-2014-11-24) (OpenAirDocs)
- Registry model: Hiller UH-12D (registry code 4360118, https://openairdocs.org/model/hiller-uh-12d) (OpenAirDocs)
- Registry engine: Lycoming VO-540 series (registry code 41534, https://openairdocs.org/engine/lycoming-vo-540-series) (OpenAirDocs)
- Reported make and model: HILLER UH12D
- Reported engine: LYC O435A
- People aboard: 1
- Fatal injuries: 1
- Pilot flight hours: 46 total, 30 in this make and model
- NTSB investigation: [NTSB ATL90FA089](https://openairdocs.org/ntsb/ATL90FA089) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900331007339A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

COLLECTIVE PITCH PUSH ROD BROKE. UNABLE TO CONTROL ROTOR PITCH CRASHED IN TREES. UNAIRWORTHY AND POORLY MAINTAINED.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ATL90FA089](https://openairdocs.org/ntsb/ATL90FA089), Mar 31, 1990: Hiller UH-12D (N94496), Soddy-Daisy, TN, substantial damage, 1 fatal. Probable cause: FATIGUE INDUCED FAILURE OF THE COLLECTIVE PITCH PUSH ROD (ADJUSTABLE) DURING FLIGHT, AND THE FAILURE OF THE PILOT TO PROVIDE ROUTINE MAINTENANCE. THE PILOT'S LACK OF EXPEREINCE AND HIS FAILURE TO…

## Other reports on N94496 (1)

Matched to the same aircraft by N-number and date.

- [Incident 19790803029959I](https://openairdocs.org/incident/19790803029959I), Aug 3, 1979: Hiller UH12D (N94496), Council Bluffs, IA, Minor damage. During simulated autorotation instructor took over controls with insufficient altitude to recover. Damage to skids.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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