# Accident 19890513011389A: Hiller UH12E, Mack, CO, May 13, 1989

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 13, 1989, 07:20 local time
- Place: Mack, CO
- Damage: Substantial damage
- Phase of flight: Low Level Operations
- Operating rules: Agricultural (Part 137)
- Operator: GIRG
- Location: 39.2198° N, 108.8709° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=39.2198&lon=-108.8709&mi=10
- Aircraft: N5594N, a cancelled registration (https://openairdocs.org/deregistered/N5594N-1989-07-27) (OpenAirDocs)
- Registry model: Hiller UH-12E (registry code 4360122, https://openairdocs.org/model/hiller-uh-12e) (OpenAirDocs)
- Reported make and model: HILLER UH12E
- Reported engine: LYC VO540C2A
- Fatal injuries: 0
- Pilot flight hours: 298 total
- NTSB investigation: [NTSB DEN89DTM02](https://openairdocs.org/ntsb/DEN89DTM02) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19890513011389A

## Narrative

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

SKIDS CAUGHT IN ALFALFA WHILE SPRAYING. HELICOPTER TUMBLED AND CRASHED.

## 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 DEN89DTM02](https://openairdocs.org/ntsb/DEN89DTM02), May 13, 1989: Hiller UH-12E (N5594N), Mack, CO, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN PROPER ALTITUDE DURING A SWATH RUN.

## Other reports on N5594N (3)

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

- [Accident 19820810036689A](https://openairdocs.org/incident/19820810036689A), Aug 10, 1982: Hiller UH12E (N5594N), Palisade, MN, Substantial damage. Engine quit during spray run. Hard landing chopped off tail boom. Broken connecting rod found to be under torqued.
- [Accident 19810720043379A](https://openairdocs.org/incident/19810720043379A), Jul 20, 1981: Hiller UH12E (N5594N), Glyndon, MN, Substantial damage. Engine quit during spray run. Hard, forced landing cut off tail boom. Found water in fuel and fuel truck.
- [Accident 19801003050129A](https://openairdocs.org/incident/19801003050129A), Oct 3, 1980: Hiller UH12E (N5594N), Argusville, ND, Substantial damage. Pilot attempted emergency landing after main rotor clutch failed. Touched down on soft ground.

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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