# NTSB CEN15CA072: Cubcrafters CC11-160, N471LS, Middleton, WI, December 6, 2014

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Data collection · Final report
- Date: December 6, 2014, 15:15 local (21:15 UTC)
- Place: Middleton, WI
- Coordinates: 43.139999, -89.339996 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1400&lon=-89.3400&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report March 10, 2015
- Report: Approved by Office Director
- NTSB office: Central Region
- Parties: FAA Flight Standards
- NTSB case key (mKey): 90476
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN15CA072
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/90476/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=90476
- Page: https://openairdocs.org/ntsb/CEN15CA072

## Probable cause

The pilot's failure to maintain control of the airplane while braking during landing rollout.

## Findings

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

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cubcrafters CC11-160, 13 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=060006N), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Landing gear system: landing gear brakes system](https://openairdocs.org/ntsb-findings/01023240): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Cubcrafters CC11-160, 1 case](https://openairdocs.org/ntsb-findings/01023240/cases.md?model=060006N), [All aircraft, 92 cases](https://openairdocs.org/ntsb-findings/01023240/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: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Cubcrafters CC11-160, 10 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=060006N), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md)

## Analysis

The pilot reported that the tail wheel equipped airplane nosed over during landing rollout on the grass runway. He informed a Federal Aviation Administration inspector that the runway surface varied with both wet and dry areas, which caused a variable braking action. The pilot noted that the accident might have been prevented with more careful brake application. He stated that there were no failures or malfunctions with the airplane before the accident.

## Factual narrative

The pilot reported that the tail wheel equipped airplane nosed over during landing rollout on the grass runway. He informed a Federal Aviation Administration inspector that the runway surface varied with both wet and dry areas, which caused a variable braking action. The pilot noted that the accident might have been prevented with more careful brake application. He stated that there were no failures or malfunctions with the airplane before the accident.

## Aircraft

- Registration: [N471LS](https://openairdocs.org/aircraft/N471LS), registered now, S/N CC11-00342, built 2014 (OpenAirDocs)
- Reported make and model: CUBCRAFTERS INC CC11-160
- Registry model: [Cubcrafters CC11-160](https://openairdocs.org/model/cubcrafters-cc11-160) (registry code 060006N) (OpenAirDocs)
- Registry engine: [Titan OX-340CC](https://openairdocs.org/engine/titan-ox-340cc) (registry code 59470, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: CC11-00342
- Year built: 2014
- Airframe hours: 26
- Engines: Titan OX-340CC-B3J3 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Lima Sierra LLC
- Registered owner: Lima Sierra LLC
- Airworthiness certificate: Special, Special light-sport (Special)
- Last inspection: Annual, November 4, 2014, 26 hours before
- Departed: C29, Middleton, WI
- Destination: C29, Middleton, WI
- Airport: C29, Middleton Muni, runway 19, 2,000 × 120 ft, grass/turf
- Equipment: Stall warning system

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 70; injuries: minor; private; airplane ratings: single-engine land, single-engine sea; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review May 21, 2014; seat: front; flight hours: 1,546 total, 26 in this make and model, 1,502 as pilot in command, 32 in the last 90 days, 29 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 30° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 34 °F, dew point 45 °F
- Altimeter: 30.60 inHg
- Observed at: MSN, 9 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 20141206021369A](https://openairdocs.org/incident/20141206021369A), Dec 6, 2014: Cubcrafters Inc CC11-160, Middleton, WI, Substantial damage. On December 6, 2014 at 1514 CST the pilot of a cub crafters carbon cub, N471LS landed on runway 19 at Middleton airport C29 then flipped over onto its back…

## Docket (2 files)

The files NTSB released with the investigation on March 4, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=90476. 1.0 MB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 973 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40423188&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF
- Conversation Record – FAA Inspector (item 2, .PDF, 65 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40423189&FileExtension=.PDF&FileName=Conversation%20Record%20%E2%80%93%20FAA%20Inspector-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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