# NTSB DEN86LA180: Mathew M. Kerr Starduster TOO, N159MK, Roundup, MT, June 28, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 28, 1986, 09:35 local (15:35 UTC)
- Place: Roundup, MT
- Coordinates: 46.440448, -108.51052 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.4404&lon=-108.5105&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16996
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86LA180
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16996/pdf
- Page: https://openairdocs.org/ntsb/DEN86LA180

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - flare - misjudged, pilot in command (cause)
- Gear collapsed, landing - flare/touchdown

## Analysis

DURING THE TELEPHONE INTERVIEW, THE PLT STATED THE ACFT LANDED HARD, COLLAPSING THE RIGHT MAIN GEAR & BROKE THE RIGHT WING SPAR.

## Aircraft

- Registration: [N159MK](https://openairdocs.org/aircraft/N159MK), registered now, S/N MK-2 (OpenAirDocs)
- Reported make and model: MATHEW M. KERR STARDUSTER TOO (STARDUSTER)
- Registry model: [Kerr Matthew STARDUSTER TOO](https://openairdocs.org/model/kerr-matthew-starduster-too) (registry code 8660385) (OpenAirDocs)
- Registry engine: [Lycoming 0-435](https://openairdocs.org/engine/lycoming-0-435) (registry code 41516, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: MK-2
- Airframe hours: 147
- Engines: LYCOMING O-435-L 190 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Mathew M. Kerr
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, August 26, 1985, 47 hours before
- Departed: GTF, GREAT FALLS, MT
- Flight plan: VFR
- Airport: RPX, Roundup Airport, runway 6, 5,100 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 921 total, 147 in this make and model, 775 as pilot in command, 23 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 40 statute miles
- Lowest ceiling: none

## 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 19860628028189A](https://openairdocs.org/incident/19860628028189A), Jun 28, 1986: Amtrso STARDUSTER2, Roundup, MT, Substantial damage. Landed hard. Impact broke off the right main gear at a weld joint. Aircraft then veered off the runway.

## Other investigations on N159MK (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 CEN13CA479](https://openairdocs.org/ntsb/CEN13CA479), Aug 10, 2013: Kerr Matthew Starduster TOO (N159MK), Frankenmuth, MI, substantial damage. Probable cause: The pilot's loss of directional control during the landing roll, which resulted in a runway excursion and subsequent impact with a corn field.
- [NTSB CHI98LA231](https://openairdocs.org/ntsb/CHI98LA231), Jul 1, 1998: Kerr Startduster TOO (N159MK), Bay City, MI, substantial damage. Probable cause: the pilot's failure to assure the tailwheel tire had adequate pressure which resulted in his inability to maintain directional control of the airplane during a landing. Factors associated with the…

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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