# NTSB WPR11CA110: Walker Louie H Super 18 Cuby, N92LW, Toutle, WA, January 26, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: January 26, 2011, 13:30 local (21:30 UTC) - Place: Toutle, WA - Coordinates: 46.348888, -122.70417 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.3489&lon=-122.7042&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: No injuries - Injuries: 1 uninjured - Status: Completed, report June 8, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Spokane FSDO - NTSB case key (mKey): 78228 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA110 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78228/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78228 - Page: https://openairdocs.org/ntsb/WPR11CA110 ## Probable cause The pilot's excessive braking during the landing roll, which resulted in the airplane nosing over onto its back. Contributing to the accident was the pilot's decision to land on a sandbar that he had not adequately inspected and his improper airspeed while on final approach. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Aircraft capability: braking capability](https://openairdocs.org/ntsb-findings/01061050): Aircraft › Aircraft oper/perf/capability · Incorrect use/operation (probable cause); cases with it: [Walker Louie H SUPER 18 CUBY, 1 case](https://openairdocs.org/ntsb-findings/01061050/cases.md?model=056556K), [All aircraft, 57 cases](https://openairdocs.org/ntsb-findings/01061050/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Walker Louie H SUPER 18 CUBY, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=056556K), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Performance/control parameters: airspeed](https://openairdocs.org/ntsb-findings/01062010): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Walker Louie H SUPER 18 CUBY, 1 case](https://openairdocs.org/ntsb-findings/01062010/cases.md?model=056556K), [All aircraft, 1,681 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Walker Louie H SUPER 18 CUBY, 1 case](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=056556K), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/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: [Walker Louie H SUPER 18 CUBY, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=056556K), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis According to the pilot, while en route to his destination airport he decided to land on a sandbar in a nearby river. After touching down on the sandbar, the pilot realized that the available stopping distance was less than he had thought, so he applied hard braking in order to stop the airplane. During the braking sequence the airplane nosed over onto its back, resulting in substantial damage to the top portion of the rudder. The pilot said that he had not properly inspected the landing zone, and that his airspeed was too fast on final approach. He also stated that the airplane did not experience any mechanical malfunctions prior to the accident. ## Factual narrative According to the pilot, while en route to his destination airport, he decided to land on a sandbar in a nearby river. After touching down on the sandbar, the pilot realized that the available stopping distance was less than he had thought, so he applied hard braking in order to stop the airplane. During the braking sequence the airplane nosed over onto its back, resulting in the top portion of the rudder being bent over. The pilot said that he had not properly inspected the landing zone, and that his airspeed was too fast on final. He also stated that the airplane did not experience any mechanical malfunctions. ## Aircraft - Registration: [N92LW](https://openairdocs.org/aircraft/N92LW), registered now, S/N LW5870, built 1987 (OpenAirDocs) - Reported make and model: WALKER LOUIE H SUPER 18 CUBY - Registry model: [Walker Louie H SUPER 18 CUBY](https://openairdocs.org/model/walker-louie-h-super-18-cuby) (registry code 056556K) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: LW5870 - Engines: LYCOMING O-320 SERIES 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Gray Carey G - Registered owner: Gray Carey G - Airworthiness certificate: Special, Experimental (Special) - Departed: KCLS, Chehalis, WA - Destination: KPLU, Puyallup, WA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review June 6, 2009; seat: front; flight hours: 3,519 total, 1,096 in this make and model ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 50 °F ## 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 20110126001339A](https://openairdocs.org/incident/20110126001339A), Jan 26, 2011: Walker Loui SUPER 18 CU, Toutle, WA, Substantial damage. Pilot was landing on sand bar in middle of Toutle river and said he was too fast on approach and had to brake too hard on last stage of rollout to stop short… ## Docket (1 files) The files NTSB released with the investigation on February 25, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78228. 137 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 137 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40344161&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.