# NTSB SEA84LA151: Bell 47G-3B-1, N501FH, Shelley, ID, July 2, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 2, 1984, 07:15 local (13:15 UTC)
- Place: Shelley, ID
- Coordinates: 43.340877, -112.07093 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.3409&lon=-112.0709&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39952
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA151
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39952/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA151

## Analysis

THE ACFT COLLIDED WITH THE GROUND DURING AN AG FLT. THE PLT REPORTED THE WINDS WERE 3 TO 5 KTS WITH NO GUSTS WHEN THE ACCIDENT OCCURRED BUT THAT THE WINDS ARE UNPREDICTABLE AT THE BASE OF THE MOUNTAINS AND A GUST OF WIND CAUGHT THE ACFT. THE PLT ALSO STATED THAT THE TURBO CHARGED ENGINE WAS SLOW TO RESPOND TO HIS THROTTLE INPUTS.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with terrain/water, maneuvering - aerial application
  - altitude - misjudged, pilot in command (cause)
  - clearance - not maintained, pilot in command (cause)
- Nose over, other

## Aircraft

- Registration: N501FH (not matched to a registry record)
- Reported make and model: BELL 47G-3B-1
- Category: Helicopter
- Serial number: 6543
- Airframe hours: 6845
- Engines: LYCOMING TVO-435-D1A 270 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Freedom Helicopters
- Airworthiness certificate: Standard, Normal
- Departed: NONE, SHELLEY, ID
- Destination: NONE, SHELLEY, ID

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; flight instructor, commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 2,134 total, 364 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 6 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 52 °F, dew point 37 °F
- Altimeter: 30.00 inHg
- Observed at: IDA, 10 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840702029119A](https://openairdocs.org/incident/19840702029119A), Jul 2, 1984: Bell 47G3B1, Shelley, ID, Substantial damage. Pilot claims gust of wind forced helicopter into ground during procedure turn.

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.

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