WPR11CA110

NTSB accident investigation · Walker Louie H Super 18 Cuby · Toutle, WA · January 26, 2011

Accident · No injuriesData collectionFinal report
Date
January 26, 2011, 13:30 local (21:30 UTC)
Place
Toutle, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N92LWWalker Louie H Super 18 Cuby
Defining event
Landing-landing roll: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report June 8, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Spokane FSDO
FAA report
20110126001339A
Case key
78228

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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 · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Aircraft capability: braking capabilityAircraft › Aircraft oper/perf/capability · Incorrect use/operationWalker Louie H SUPER 18 CUBY: 1 caseAll aircraft: 57 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedWalker Louie H SUPER 18 CUBY: 1 caseAll aircraft: 1,681 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

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
Reported as
Walker Louie H Super 18 Cuby
Category
Airplane, amateur-built
Serial number
LW5870
Engine
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

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
54
Injuries
None
Certificate
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

Docket · 1

The files NTSB released with the investigation on February 25, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 137 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.