# NTSB CEN10CA530: Cullis Ultracruiser Sport, N716CS, Defiance, OH, September 5, 2010

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: September 5, 2010, 19:30 local (23:30 UTC)
- Place: Defiance, OH
- Coordinates: 41.281665, -84.316947 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.2817&lon=-84.3169&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 16, 2011
- Report: Approved by Office Director
- NTSB office: Central Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 77246
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN10CA530
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/77246/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=77246
- Page: https://openairdocs.org/ntsb/CEN10CA530

## Probable cause

The pilot's failure to maintain aircraft control during the landing roll.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Terrain: rough terrain](https://openairdocs.org/ntsb-findings/03021015): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Cullis Chris II ULTRACRUISER SPORT, 1 case](https://openairdocs.org/ntsb-findings/03021015/cases.md?model=056252K), [All aircraft, 442 cases](https://openairdocs.org/ntsb-findings/03021015/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cullis Chris II ULTRACRUISER SPORT, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=056252K), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cullis Chris II ULTRACRUISER SPORT, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=056252K), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)

## Analysis

The student pilot reported that he landed on a 1,500-foot-long strip of grass near his friend’s house. According to the pilot, after landing the tailwheel-equipped airplane sustained substantial damage when it came to an abrupt stop while taxiing on the rough terrain. As a result of the airplane's abrupt stop, the nose lunged forward and the propeller impacted the terrain. The pilot reported no preimpact mechanical malfunctions with the airframe or engine.

## Factual narrative

The student pilot reported that he landed on a strip of grass about 1,500 feet long near his friend’s house. According to the pilot, after landing, the tailwheel airplane sustained substantial damage when it came to an abrupt stop while taxiing in the rough terrain. The pilot said that the airplane’s nose went forward, the propeller impacted the terrain, and then the fuselage came back down. The pilot reported no mechanical malfunctions with the airplane in reference to the flight.

## Aircraft

- Registration: [N716CS](https://openairdocs.org/deregistered/N716CS-2013-09-17), registration cancelled 2013-09-17, S/N 532, built 2008 (OpenAirDocs)
- Reported make and model: CULLIS ULTRACRUISER SPORT
- Registry model: [Cullis Chris II ULTRACRUISER SPORT](https://openairdocs.org/model/cullis-chris-ii-ultracruiser-sport) (registry code 056252K) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 532
- Airframe hours: 18
- Engines: Hummel 37 37 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Condition, April 16, 2008
- Departed: 0G6, Bryan, OH
- Destination: PVT, Defiance, OH
- Flight plan: Unknown

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; injuries: none; student; medical: class 3; flight hours: 33 total, 18 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 3 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 45 °F
- Altimeter: 29.97 inHg
- Observed at: DFI

## 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 20100905044929A](https://openairdocs.org/incident/20100905044929A), Sep 5, 2010: Cullis Chri ULTRACRUISE, Defiance, OH, Substantial damage. On September 5, 2010 aircraft, N716CS at 1934 pm pilot attempted to land in a field at 11757 st. rt 18 sherwood Ohio. The plane was attempting to land from…

## Docket (1 files)

The files NTSB released with the investigation on October 12, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=77246. 310 KB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 310 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40337202&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF

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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