WPR11LA371

NTSB accident investigation · Carpenter Kolb Twinstar III · Republic, WA · August 2, 2011

Accident · No injuriesLimited investigationFinal report
Date
August 2, 2011, 08:45 local (15:45 UTC)
Place
Republic, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3135JCarpenter Kolb Twinstar III
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report December 19, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20110802015379A
Case key
81401

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 maintain 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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCarpenter Kenton P KOLB TWINSTAR III: 1 caseAll aircraft: 3,958 casesProbable cause
Object/animal/substanceEnvironmental issues › Physical environment · Effect on equipmentCarpenter Kenton P KOLB TWINSTAR III: 1 caseAll aircraft: 224 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 reported that he had not flown for several years and had just received training from a certified flight instructor. During his first solo flight since the training, he was conducting touch-and-go takeoffs and landings. On the fourth landing, the airplane veered off the runway to the left side and ground-looped. After departing the runway, the airplane impacted a metal obstruction with the left landing gear, substantially damaging the tubular fuselage structure.

Factual narrative

On August 2, 2011, at 0845 Pacific daylight time, a Carpenter Kolb Twinstar III, N3135J, veered off the runway during landing at Ferry County Airport, Republic, Washington. The airplane sustained substantial damage. The recreational pilot, who was operating under sport pilot privileges, was not injured. The flight was being operated under Title 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed and no flight plan was filed. The pilot reported that he had not flown for several years. He had recently received training from a certified flight instructor, and was on his first solo flight since receiving the training. During this flight, the pilot was conducting touch-and-go takeoffs and landings. On the fourth landing on runway 35, the pilot reported that he tried to settle the tailwheel too soon and with too much speed. The airplane subsequently veered off the runway to the left side, and ground looped. After departing the runway, the airplane impacted a metal obstruction with the left landing gear. The tubular fuselage structure sustained substantial damage. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N3135J
Reported as
Carpenter Kolb Twinstar III
Category
Airplane, amateur-built
Serial number
3-12
Airframe hours
146
Engine
Rotax 582, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Kenton Carpenter
Registered owner
Kenton Carpenter
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · August 1, 2011 · 1 hours before
Departed
R49 · Republic, WA
Destination
R49 · Republic, WA
Flight plan
Unknown
Airport
R49 · Ferry County Airport, runway 35, 3,498 × 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
52
Injuries
None
Certificate
Recreational
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
July 28, 2011
Seat
Left
Flight hours
198 total · 128 in this make and model · 134 as pilot in command · 2 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
10° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 41 °F
Altimeter
29.95 inHg
Observed at
KOMK, 37 nm away

Docket · 2

The files NTSB released with the investigation on November 3, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 900 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.

Other investigations on N3135J · 1

Matched to the same aircraft by N-number and date.