# NTSB MKC84LA074: Piper PA-20, N4944M, Boonville, MO, February 13, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: February 13, 1984, 12:00 local (18:00 UTC)
- Place: Boonville, MO
- Coordinates: 38.960575, -92.740043 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.9606&lon=-92.7400&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33630
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA074
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33630/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA074

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - not corrected, pilot in command (cause)
- Nose over, landing - roll

## Analysis

THE ACFT NOSED OVER AFTER LANDING. THE PLT SAID THAT THE ARPT MANAGER TOLD HIM THAT 'THERE IS A VALLEY THAT FUNNELS THE WIND AND HAS BLOWN OTHER ACFT THE SAME WAY'. THE PLT SAID THE ONLY WAY TO AVOID THIS CONDITION IS TO LAND FARTHER DOWN THE RWY.

## Aircraft

- Registration: [N4944M](https://openairdocs.org/deregistered/N4944M-2012-12-18), registration cancelled 2012-12-18, S/N 20-630 (OpenAirDocs)
- Reported make and model: PIPER PA-20
- Registry model: [Piper PA-20](https://openairdocs.org/model/piper-pa-20) (registry code 7102002) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 20-630
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Phillip T. Briggs
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 13, 1984
- Departed: 4K3, LEXINGTON, MO
- Airport: VER, Jesse Viertel Memorial, runway 18, 3,300 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 237 total, 237 as pilot in command, 3 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 12 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 52 °F, dew point 36 °F
- Altimeter: 29.00 inHg
- Observed at: COU, 19 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 19840213003239A](https://openairdocs.org/incident/19840213003239A), Feb 13, 1984: Piper PA20, Boonville, MO, Substantial damage. Veered off the runway on landing. Blamed a crosswind gust from an opening in the hills along side of the runway.

## Other investigations on N4944M (2)

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 FTW83LA146](https://openairdocs.org/ntsb/FTW83LA146), Mar 10, 1983: Piper PA-20 (N4944M), Martinsville, TX, substantial damage
- [NTSB DIA70D0032](https://openairdocs.org/ntsb/DIA70D0032), Jul 28, 1969: Piper PA-20 (N4944M), Advance, NC, 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.

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