# NTSB MKC89LA195: Bell 47G, N182JR, Ozark, MO, September 2, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 2, 1989, 12:15 local (17:15 UTC)
- Place: Ozark, MO
- Coordinates: 37.009571, -93.199249 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.0096&lon=-93.1992&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 11, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 34861
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA195
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34861/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA195

## Probable cause

THE FAILURE OF THE DUAL STUDENT TO PROPERLY FLARE DURING AN AUTOROTATIVE LANDING RESULTING IN A HARD LANDING AND PARTIAL FAILURE OF THE RIGHT SKID. THE CFI ALSO FAILED TO PROPERLY MONITOR THE STUDENT'S ACTIONS ON THE FLIGHT CONTROLS.

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - autorotation - misjudged, dual student (cause)
  - landing gear,skid assembly - failure,partial (contributing factor)
  - supervision - inadequate, pilot in command(cfi) (cause)
- Nose over, landing - flare/touchdown
- Roll over, landing - flare/touchdown

## Analysis

WHILE PRACTICING AUTOROTATION LANDINGS, THE TAIL BOOM BEGAN TO RISE AFTER TOUCHDOWN WHICH RESULTED IN THE HELICOPTER ROLLING TO THE RIGHT AND THE MAIN ROTOR BLADES STRIKING THE TERRAIN. THE HELICOPTER CAME TO REST ON IT'S RIGHT SIDE. ACCIDENT INVESTIGATION REVEALED THAT THE RIGHT SKID, FORWARD OF THE FRONT UPRIGHT HAD FRACTURED. THE BROKEN PORTION OF THE SKID HAD CUT A GROOVE IN THE GRASS A DISTANCE OF ABOUT 2 FEET BEFORE IMBEDDING ITSELF, CAUSING THE HELICOPTER TO STOP. THE FORWARD INERTIA BOUGHT THE TAIL BOOM UP WHICH RESULTED IN THE ROTOR STRIKE AND ROLL OVER.

## Aircraft

- Registration: [N182JR](https://openairdocs.org/deregistered/N182JR-2019-10-17), registration cancelled 2019-10-17, S/N 22, built 1947 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 22
- Airframe hours: 10707
- Engines: FRANKLIN 6V-335-53 210 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Dick Hill Int. Flight School
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 13, 1989, 76 hours before
- Departed: 2K2, OZARK, MO
- Airport: 2K2, Air Park South, runway 17, 800 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 379 total, 160 in this make and model, 265 as pilot in command, 74 in the last 90 days, 33 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 60° at 5 knots
- Visibility: 7 statute miles
- Lowest ceiling: 1,200 ft overcast
- Temperature: 75 °F, dew point 70 °F
- Observed at: SGF, 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 19890902033339A](https://openairdocs.org/incident/19890902033339A), Sep 2, 1989: Bell 47G, Ozark, MO, Substantial damage. Main front skid brace broke from fatigue on practice autorotation landing. Rotors hit and helicopter rolled over.

## Other investigations on N182JR (3)

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 MIA98LA170](https://openairdocs.org/ntsb/MIA98LA170), May 28, 1998: Bell 47G (N182JR), Bunnell, FL, substantial damage. Probable cause: The pilot-in-command(CFI) failure to maintain control of the aircraft.
- [NTSB LAX85LA079](https://openairdocs.org/ntsb/LAX85LA079), Dec 22, 1984: Bell 47G (N182JR), Chatsworth, CA, destroyed
- [NTSB LAX80FUQ11](https://openairdocs.org/ntsb/LAX80FUQ11), Feb 26, 1980: Bell 47G (N182JR), Pacoima, CA, substantial damage

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.