WPR10CA179

NTSB accident investigation · Stinson 108-3 · Lebanon, OR · March 25, 2010

Accident · Minor injuriesData collectionFinal report
Date
March 24, 2010, 18:00 local (Mar 25, 2010, 01:00 UTC)
Place
Lebanon, OR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6063MStinson 108-3
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report July 1, 2010
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA (Portland FSDO)
FAA report
20100324029989A
Case key
75582

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 failure to release his brake application after adding power to regain directional control during the landing roll.

Findings · 3

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.

Action: incorrect action performancePersonnel issues › Action/decision · PilotStinson 108-3: 3 casesAll aircraft: 1,386 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeStinson 108-3: 3 casesAll aircraft: 1,008 cases
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeStinson 108-3: 5 casesAll aircraft: 1,199 cases

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

The pilot of the tailwheel-equipped airplane completed a number of touch-and-go landings, and then made a full-stop landing so that he could taxi to the parking area to talk with some friends. When he took off again a few minutes later to do one final landing before putting the airplane away, he discovered that the wind speed had picked up and that he would be landing in a gusting crosswind. During the landing roll, which was along the leeward side of a row of hangars with occasional spaces between them, the airplane started turning toward the left side of the runway (into the wind). When the pilot found that full right brake and full right rudder was not enough to bring the airplane back to the right, he added a significant amount of engine power in an attempt to regain control. Although the airplane's ground track began to straighten after he added power, the pilot kept the right-wheel brake fully applied, resulting in the airplane attaining a nose-down attitude, whereupon the propeller began hitting the runway surface. With the propeller hitting the runway surface, the pilot found it necessary to reduce power, and therefore the airplane turned further left, and its left main wheel departed the left edge of the runway onto soft terrain. The left wheel then sank into the terrain, and with the right brake still fully applied, the airplane nosed over onto its back. The accident sequence resulted in substantial damage to the vertical stabilizer, left wing, and left wing lift strut.

Factual narrative

The pilot of the tailwheel-equipped airplane completed a number of touch-and-go landings, and then made a full-stop landing so he could taxi to the parking area to talk with some friends. When he took off again a few minutes later to do one final landing before putting the airplane away, he discovered that the wind speed had picked up, and that he would be landing in a gusting crosswind. During the landing roll, which was along the leeward side of a row of hangars with occasional spaces between them, the airplane started turning toward the left side of the runway (into the wind). When the pilot found that full right brake and full right rudder was not enough to bring the airplane back to the right, he added a significant amount of engine power in an attempt to regain control. Although the airplane's ground track began to straighten after he added power, the pilot kept the right wheel brake fully applied, resulting in the airplane attaining a nose-down attitude, whereupon the propeller began hitting the runway surface. With the propeller hitting the runway surface, the pilot found it necessary to reduce power, and therefore the airplane turned further left, and its left main wheel departed the left edge of the runway onto some soft terrain. The left wheel then sank into the terrain, and with the right brake still fully applied, the airplane nosed over onto its back. The accident sequence resulted in substantial damage to the vertical stabilizer, left wing, and left wing lift strut.

Aircraft

Registration
N6063M
Reported as
Stinson 108-3
Category
Airplane
Serial number
108-4063
Engine
Continental O-470-R, 230 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Knox Larry D
Registered owner
Knox Larry D
Airworthiness certificate
Standard, Normal
Departed
S30 · Lebanon, OR
Destination
S30 · Lebanon, OR
Flight plan
Unknown
Airport
S30 · Lebanon State, runway 34, 2,877 × 60 ft, asphalt

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
68
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
October 24, 2009
Seat
Left
Flight hours
797 total · 35 in this make and model · 12 in the last 90 days · 6 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 8 knots, gusting 30
Visibility
10 statute miles
Lowest ceiling
None

Docket · 2

The files NTSB released with the investigation on March 31, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 MB 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.