# Accident 19940518011819A: Bell 47G, Sulphur, OK, May 18, 1994

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 18, 1994, 18:30 local time
- Place: Sulphur, OK
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: Agricultural (Part 137)
- Operator: SNMG
- Location: 34.5005° N, 96.9695° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=34.5005&lon=-96.9695&mi=10
- Aircraft: N933B, a cancelled registration (https://openairdocs.org/deregistered/N933B-2017-06-30) (OpenAirDocs)
- Registry model: Bell 47G (registry code 1181002, https://openairdocs.org/model/bell-47g) (OpenAirDocs)
- Registry engine: Franklin 6V4 series (registry code 27033, https://openairdocs.org/engine/franklin-6v4-series) (OpenAirDocs)
- Reported make and model: BELL 47G
- Reported engine: FRNKLN 6V335A
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 1,618 total, 1,164 in this make and model
- NTSB investigation: [NTSB FTW94LA166](https://openairdocs.org/ntsb/FTW94LA166) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19940518011819A

## Narrative

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

ENGINE FAILED ON SPRAY RUN PULLUP. UNABLE FULL AUTORATATION. HARD IMPACT. CUT TAILBOOM. OIL PUMP DRIVE GEAR FAILED.

## 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 FTW94LA166](https://openairdocs.org/ntsb/FTW94LA166), May 18, 1994: Bell 47G (N933B), Sulphur, OK, substantial damage. Probable cause: THE LOSS OF ENGINE POWER DUE TO THE FAILURE OF AN ENGINE ACCESSORY OIL PUMP GEAR. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE AUTOROTATION.

## Other reports on N933B (2)

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

- [Incident 19780202005569I](https://openairdocs.org/incident/19780202005569I), Feb 2, 1978: Bell 47G (N933B), Huron, CA, Minor damage. Helicopters engine quit after refueling from nurse rig. Fuel pumped from barrell. Contained rusty water.
- [Accident 19750820028299A](https://openairdocs.org/incident/19750820028299A), Aug 20, 1975: Bell 47G (N933B), King City, CA, Substantial damage. Main rotors severed tail boom.

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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