# NTSB SEA84LA132: Bell 47G2A, N11VH, Buena, WA, June 14, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 14, 1984, 13:45 local (20:45 UTC)
- Place: Buena, WA
- Coordinates: 46.429267, -120.319808 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.4293&lon=-120.3198&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39935
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA132
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39935/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA132

## Sequence of events

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

- In flight collision with object, maneuvering - aerial application
  - visual lookout - inadequate, pilot in command (cause)
  - clearance - not maintained, pilot in command (cause)
  - inattentive, pilot in command (contributing factor)
  - object - tree(s)
- Loss of control - in flight, maneuvering - aerial application
- Roll over, descent - uncontrolled

## Analysis

MAIN ROTOR BLADES CONTACTED A WIND MACHINE DURING AN AERIAL APPLICATION FLT. HELICOPTER SETTLED INTO TREES AND ROLLED OVER. PLT SAID HE KNEW THE MACHINE WAS THERE BUT HAD FORGOTTEN.

## Aircraft

- Registration: [N11VH](https://openairdocs.org/deregistered/N11VH-2011-07-19), registration cancelled 2011-07-19, S/N 2027, built 1958 (OpenAirDocs)
- Reported make and model: BELL 47G2A
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2127
- Airframe hours: 8780
- Engines: LYCOMING VO-435-A1E 240 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Valicoptors Inc
- Registered owner: Valicopters, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, December 15, 1983, 71 hours before
- Departed: BUENA, WA
- Destination: BUENA, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 4,672 total, 1,620 in this make and model, 4,443 as pilot in command, 75 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 7 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 57 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: YKM, 12 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 19840614026489A](https://openairdocs.org/incident/19840614026489A), Jun 14, 1984: Bell 47G2A, Buena, WA, Substantial damage. Aircraft struck wind machine with main rotor blades while spraying an orchard.

## Other investigations on N11VH (6)

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 SEA99LA149](https://openairdocs.org/ntsb/SEA99LA149), Aug 26, 1999: Bell 47G-2 (N11VH), Benton City, WA, destroyed, 1 fatal. Probable cause: A loss of power for undetermined reasons and the failure of the pilot to maintain adequate rotor RPM following the power loss. Contributing factors were the pilot's lack of certification and total…
- [NTSB SEA86LA143](https://openairdocs.org/ntsb/SEA86LA143), Jun 12, 1986: Bell 47G-2 (N11VH), Zillah, WA, destroyed
- [NTSB SEA85LA155](https://openairdocs.org/ntsb/SEA85LA155), Jul 2, 1985: Bell 47G2 (N11VH), Roosevelt, WA, substantial damage
- [NTSB SEA82DA072](https://openairdocs.org/ntsb/SEA82DA072), May 18, 1982: Bell 47G-2 (N11VH), Grandview, WA, substantial damage
- [NTSB SEA82DA050](https://openairdocs.org/ntsb/SEA82DA050), Apr 10, 1982: Bell 47G-2A (N11VH), Lyle, WA, substantial damage
- [NTSB FTW74FPJ06](https://openairdocs.org/ntsb/FTW74FPJ06), Aug 16, 1973: EL Tomcat MK5 (N11VH), Springer, OK, substantial damage, 1 fatal

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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