# NTSB CHI84LA245: Bell 47-G2, N18JM, Nimrod, MN, June 18, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: June 17, 1984, 19:30 local (Jun 18, 1984, 00:30 UTC)
- Place: Nimrod, MN
- Location: 46.6335° N, 94.8806° W: Placed by OpenAirDocs: center of Nimrod, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.6335&lon=-94.8806&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12658
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA245
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12658/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA245

## Sequence of events

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

- In flight collision with terrain/water, landing - flare/touchdown
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - hidden obstruction(s)
  - terrain condition - rough/uneven
- Roll over, landing - flare/touchdown

## Analysis

WHILE LANDING IN AN AREA OF TALL GRASS A SKID COLLIDED WITH A SAND RIDGE CAUSING A ROLL OVER.

## Aircraft

- Registration: [N18JM](https://openairdocs.org/deregistered/N18JM-2012-08-13), registration cancelled 2012-08-13, S/N 2334, built 1959 (OpenAirDocs)
- Reported make and model: BELL 47-G2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2334
- Airframe hours: 1258
- Engines: LYCOMING VO-435-A1B 200 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Ed G. Johnson
- Airworthiness certificate: Standard, Normal
- Departed: NIMROD, MN

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; commercial; instrument ratings: helicopter; medical: class 2, valid medical--w/ waivers/lim; flight hours: 215 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 8 knots
- Visibility: 12 statute miles
- Lowest ceiling: 1,500 ft broken
- Temperature: 75 °F, dew point 70 °F
- Altimeter: 29.00 inHg
- Observed at: AXN, 50 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 19840617073299A](https://openairdocs.org/incident/19840617073299A), Jun 17, 1984: Bell 47G2, Nimrod, MN, Destroyed. Pilot caught skid in sand ridge and helicopter rolled over. Sheriff smelled alcohol on breath. FAA action pending.

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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