# Accident 19880910038059A: Hiller UH12E, Helm, CA, September 10, 1988

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 10, 1988, 16:30 local time
- Place: Helm, CA
- Damage: Substantial damage
- Phase of flight: To Vertical (Helicopter Only)
- Operating rules: Agricultural (Part 137)
- Operator: JAGG
- Location: 36.5309° N, 120.1090° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=36.5309&lon=-120.1090&mi=10
- Aircraft: N4029Y, a cancelled registration (https://openairdocs.org/deregistered/N4029Y-2018-02-13) (OpenAirDocs)
- Registry model: Hiller UH-12E (registry code 4360122, https://openairdocs.org/model/hiller-uh-12e) (OpenAirDocs)
- Registry engine: Lycoming VO-540 series (registry code 41534, https://openairdocs.org/engine/lycoming-vo-540-series) (OpenAirDocs)
- Reported make and model: HILLER UH12E
- Reported engine: LYC VO540C2A
- Fatal injuries: 0
- Pilot flight hours: 5,500 total, 3,500 in this make and model, 120 in the last 90 days
- NTSB investigation: [NTSB LAX88DVA16](https://openairdocs.org/ntsb/LAX88DVA16) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19880910038059A

## Narrative

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

FAILED TO DISCONNECT THE CHEMICAL FILLER HOSE PRIOR TO LIFTOFF FROM TRUCK PLATFORM. HELICOPTER ROLLED OVER.

## 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 LAX88DVA16](https://openairdocs.org/ntsb/LAX88DVA16), Sep 10, 1988: Hiller UH-12E (N4029Y), Helm, CA, substantial damage

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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