# Accident 19940909026059A: Hiller UH12E, Grand Junction, CO, September 9, 1994

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 9, 1994, 12:40 local time
- Place: Grand Junction, CO
- Damage: Substantial damage
- Phase of flight: Autorot Descent (Rotorcraft)
- Operating rules: General operating rules (Part 91)
- Location: 39.1097° N, 108.5307° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=39.1097&lon=-108.5307&mi=10
- Aircraft: N12RF (not matched to a registry record)
- Reported make and model: HILLER UH12E
- Reported engine: LYC VO540C2A
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 11,175 total, 12 in this make and model, 85 in the last 90 days
- NTSB investigation: [NTSB FTW94LA296](https://openairdocs.org/ntsb/FTW94LA296) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19940909026059A

## Narrative

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

PRACTICE AUTOROTATION TO SANDBAR. ALLOWED ROTOR SPEED DECAY. LANDED HARD. ROTORS CHOPPED OFF TAILBOOM.

## 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 FTW94LA296](https://openairdocs.org/ntsb/FTW94LA296), Sep 9, 1994: Hiller UH-12E (N12RF), Grand Junction, CO, substantial damage. Probable cause: IMPROPER REMEDIAL ACTION IN CORRECTING FOR EXCESSIVE SPEED AND SINK RATE DURING AN AUTOROTATION. FACTORS WERE: HIGH DENSITY ALTITUDE, EXCESSIVE AIRSPEED AND SINK RATE.

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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