# NTSB CEN22LA316: Piper/Cub Crafters PA-18-150, N131WK, Llano, TX, July 12, 2022

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Class 4 · Limited · Final report
- Date: July 12, 2022, 14:15 local (19:15 UTC)
- Place: Llano, TX · 2 miles NE of LLANO, TX.
- Coordinates: 30.6925, -98.7481 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.6925&lon=-98.7481&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: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Central Region
- Parties: San Antonio FSDO
- NTSB case key (mKey): 105465
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA316
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105465/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105465
- Page: https://openairdocs.org/ntsb/CEN22LA316

## Probable cause

The pilot’s failure to maintain directional control during the landing roll with a quartering tailwind.

## 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: [Piper/Cub Crafters PA-18-150, 4 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=7101843), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Piper/Cub Crafters PA-18-150, 2 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=7101843), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [Piper/Cub Crafters PA-18-150, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=7101843), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/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: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Piper/Cub Crafters PA-18-150, 2 cases](https://openairdocs.org/ntsb-events/400/sequence.md?model=7101843), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md)
- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Piper/Cub Crafters PA-18-150, 4 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=7101843), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Piper/Cub Crafters PA-18-150, 3 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=7101843), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md)
- [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Piper/Cub Crafters PA-18-150, 3 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=7101843), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md)

## Analysis

The pilot reported that, while practicing stop and go landings, the airplane touched down and immediately veered left. The pilot attempted to correct with opposite rudder and brakes. During the braking action, the airplane subsequently nosed over and came to rest inverted, which resulted in substantial damage to the wing structure. The pilot stated that there was no mechanical malfunctions or failures with the airplane that would have precluded normal operations. At the time of the accident, the pilot was landing the airplane on runway 17 R (turf) with wind from 080 at 10 knots with gusts of 15 knots.

## Aircraft

- Registration: [N131WK](https://openairdocs.org/deregistered/N131WK-2023-01-16), registration cancelled 2023-01-16, S/N 9935CC, built 2001 (OpenAirDocs)
- Reported make and model: PIPER/CUB CRAFTERS PA-18-150 (9935CC)
- Registry model: [Piper/Cub Crafters PA-18-150](https://openairdocs.org/model/piper-cub-crafters-pa-18-150) (registry code 7101843) (OpenAirDocs)
- Registry engine: [Lycoming O-360 series](https://openairdocs.org/engine/lycoming-o-360-series) (registry code 41575, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 9935CC
- Year built: 2001
- Airframe hours: 865.6
- Engines: Lycoming 0-360-C4P 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Last inspection: Annual, October 11, 2021
- Departed: TS18, Kingsland, TX
- Destination: AQO, Llano, TX
- Airport: AQO, LLANO MUNI Airport, runway 17- 35 (grass / turf), 1,000 × 50 ft, grass/turf
- Equipment: ADS-B

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 73; injuries: minor; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review December 18, 2021; seat: front; restraint: 3-point; flight hours: 1,040.5 total, 164.7 in this make and model, 973.5 as pilot in command, 18.4 in the last 90 days, 11.6 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 10 knots, gusting 15
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 100 °F
- Turbulence: Unknown
- Observed at: AQO

## 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 20220712012599A](https://openairdocs.org/incident/20220712012599A), Jul 12, 2022: Piper/Cub Crafters PA-18-150, Llano, TX, Substantial damage. The pilot was practicing touch and go landings at Llano airport. While in the traffic pattern, the pilot noticed varying wind conditions, as indicated by the…

## Docket (3 files)

The files NTSB released with the investigation on August 24, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105465. 5.7 MB in all.

- Photos (item 1, PDF, 2 pages, 2 photos, 939 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14272794&FileExtension=pdf&FileName=Photo%20Array-Rel.pdf
- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 2, PDF, 9 pages, 4.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14318798&FileExtension=pdf&FileName=6120.1_Redacted%202-Rel.pdf
- Pilot's statement (item 3, PDF, 2 pages, 125 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14320771&FileExtension=pdf&FileName=Statement%20from%20the%20pilot-Rel.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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