# NTSB SEA84LA219: Bell 206, N13ML, Boulder City, NV, September 4, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 4, 1984, 14:30 local (21:30 UTC)
- Place: Boulder City, NV
- Coordinates: 35.990829, -114.810745 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.9908&lon=-114.8107&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40003
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA219
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40003/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA219

## Sequence of events

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

- In flight collision with object, landing - flare/touchdown
  - object - fence (contributing factor)
  - clearance - misjudged, pilot in command (cause)
- In flight collision with terrain/water, landing - flare/touchdown
- Other gear collapsed, landing - flare/touchdown
  - landing gear,skid assembly - overload

## Analysis

THE PLT WAS LANDING AT A HELIPAD THAT WAS SURROUNDED BY A WIRE FENCE. HE REPORTED THAT AS HE WAS ABOUT TO LAND, HE MISJUDGED HIS APCH & THE TAIL ROTOR STRUCK THE FENCE. SUBSEQUENTLY, THE HELICOPTER HIT THE GROUND WHILE TURNING RIGHT & THE GEAR COLLAPSED.

## Aircraft

- Registration: [N13ML](https://openairdocs.org/deregistered/N13ML-2009-12-16), registration cancelled 2009-12-16, S/N 489, built 1969 (OpenAirDocs)
- Reported make and model: BELL 206
- Registry model: [Bell 206B II](https://openairdocs.org/model/bell-206b-ii) (registry code 1181505) (OpenAirDocs)
- Registry engine: [Allison 250 SER 250HP](https://openairdocs.org/engine/allison-250-ser-250hp) (registry code 03002, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Serial number: 489
- Airframe hours: 7364
- Engines: ALLISON 250-C20 317 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 91
- Operator: Action Jet Ranger Helicopters
- Registered owner: Action Jet Ranger Helicopters
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 12, 1984, 24 hours before
- Departed: BOULDER CITY, NV

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; commercial; instrument ratings: helicopter; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 4,329 total, 471 in this make and model, 2,900 as pilot in command, 22 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 6 knots, gusting 10
- Visibility: 75 statute miles
- Lowest ceiling: none
- Temperature: 102 °F, dew point 41 °F
- Altimeter: 29.00 inHg
- Observed at: LAS, 18 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 19840904068039A](https://openairdocs.org/incident/19840904068039A), Sep 4, 1984: Bell 206A, Boulder City, NV, Substantial damage. Developed high unchecked sink rate while landing on a helipad. The tail rotor struck a perimeter fence.

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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