# NTSB CHI07CA019: Aviat S2B, N149TM, Larimore, ND, October 29, 2006

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: October 29, 2006, 15:00 local (21:00 UTC)
- Place: Larimore, ND
- Coordinates: 47.906944, -97.640556
- Nearby events: https://openairdocs.org/map.md?lat=47.9069&lon=-97.6406&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 26, 2007
- Report: Approved by Office Director
- Parties: Fargo, ND FSDO
- NTSB case key (mKey): 64968
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI07CA019
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64968/pdf
- Page: https://openairdocs.org/ntsb/CHI07CA019

## Probable cause

The pilot's failure to maintain proper alignment with the runway which resulted in the airplane nosing over.  A factor associated with the accident was the soft terrain encountered.

## Sequence of events

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

- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - soft (contributing factor)
  - proper alignment - not maintained, pilot in command (cause)
- Nose over, landing - roll

## Analysis

The airplane nosed over after contacting soft terrain while landing.  The pilot stated that he was landing on his private grass airstrip when the accident happened.  He stated that he misjudged the runway and the right main gear contacted "very soft" dirt on the south edge of the runway during the landing roll.  The pilot reported the airplane was traveling between 5 and 10 miles per hour when it nosed over.

## Factual narrative

The airplane nosed over after contacting soft terrain while landing.  The pilot stated that he was landing on his private grass airstrip when the accident happened.  He stated that he misjudged the runway and the right main gear contacted "very soft" dirt on the south edge of the runway during the landing roll.  The pilot reported the airplane was traveling between 5 and 10 miles per hour when it nosed over.  The vertical stabilizer, rudder, one propeller blade, and a wing rib were damaged during the landing.

## Aircraft

- Registration: [N149TM](https://openairdocs.org/aircraft/N149TM), registered now, S/N 5165 (OpenAirDocs)
- Reported make and model: Aviat S2B
- Registry model: [Christen Industries PITTS S-2B](https://openairdocs.org/model/christen-industries-pitts-s-2b) (registry code 2210006) (OpenAirDocs)
- Registry engine: [Lycoming AEIO-540 series](https://openairdocs.org/engine/lycoming-aeio-540-series) (registry code 41568, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 5165
- Engines: Lycoming AEIO-540 reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Roger A. Thompson
- Airworthiness certificate: Standard, Aerobatic
- Departed: PVT, Larimore, ND
- Destination: Larimore, ND

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2; flight hours: 3,000 total, 80 in this make and model, 150 in the last 90 days, 30 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day

## 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 20061029026549A](https://openairdocs.org/incident/20061029026549A), Oct 29, 2006: Aviat PITTSS2B, Larimore, ND, Minor damage. (-23) The pilot was landing at his private sod strip which is quite narrow and surrounded by some areas of wet ground. After touching down the aircraft got off…

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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