WPR10CA290

NTSB accident investigation · Waco UKC-S · Seattle, WA · June 14, 2010

Accident · No injuriesData collectionFinal report
Date
June 13, 2010, 18:35 local (Jun 14, 2010, 01:35 UTC)
Place
Seattle, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N14611Waco UKC-S
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report July 22, 2010
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20100613005259A
Case key
76308

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 inadequate compensation for the crosswind condition, resulting in a loss of directional control during the landing roll.

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedWaco UKC-S: 1 caseAll aircraft: 3,958 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationWaco UKC-S: 1 caseAll aircraft: 1,199 cases
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationWaco UKC-S: 1 caseAll aircraft: 1,008 cases
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Response/compensationWaco UKC-S: 1 caseAll aircraft: 1,008 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

The pilot stated that prior to entering the traffic pattern in a tail-wheel equipped airplane for landing on runway 31L, the airport’s automatic terminal information service (ATIS) indicated that the wind was from 040 degrees at 11 knots, gusting to 15 knots. The pilot said the maximum crosswind component for the airplane is 15 knots and that he has previously landed this airplane in similar crosswind conditions. Throughout the traffic pattern the pilot requested the wind direction and speed from the controller and on short final, the wind was reported from 030 degrees at 11 knots. The landing was uneventful; however, during the landing roll, a gust of wind lifted the right wing and despite the pilot’s control inputs, the left wing scraped the ground as the airplane turned to the right. Subsequently, the left main landing gear collapsed. The airplane slid and came to a rest perpendicular to the runway. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. The weather reporting station located at the accident airport reported the wind at the time of the accident was from 030 degrees at 8 knots gusting to 17 knots. In a written statement, the pilot stated that the accident could have been prevented by landing at a nearby airport until conditions improved.

Factual narrative

The pilot stated that prior to entering the traffic pattern in a tail-wheel equipped airplane for landing on runway 31L, the airport’s automatic terminal information service (ATIS) indicated that the wind was from 040 degrees at 11 knots, gusting to 15 knots. The pilot said the maximum crosswind component for the airplane is 15 knots and that he has previously landed this airplane in similar crosswind conditions. Throughout the traffic pattern the pilot requested the wind direction and speed from the controller and on short final, the wind was reported from 030 degrees at 11 knots. The landing was uneventful; however, during the landing roll, a gust of wind lifted the right wing and despite the pilot’s control inputs, the left wing scraped the ground as the airplane turned to the right. Subsequently, the left main landing gear collapsed. The airplane slid and came to a rest perpendicular to the runway. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. The weather reporting station located at the accident airport reported the wind at the time of the accident was from 030 degrees at 8 knots gusting to 17 knots. In a written statement, the pilot stated that the accident could have been prevented by landing at a nearby airport until conditions improved.

Aircraft

Registration
N14611
Reported as
Waco UKC-S
Category
Airplane
Serial number
3978
Airframe hours
2,005
Engine
Cont Motor W670 SERIES, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Kenneth D. Horwitz
Registered owner
Gold Cap LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 4, 2010 · 21 hours before
Departed
WA96 · Bremerton, WA
Destination
KBFI · Seattle, WA
Airport
KBFI · Boeing Field, runway 31L, 10,000 × 200 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
57
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
April 21, 2010
Seat
Left
Flight hours
6,482 total · 25 in this make and model · 6,482 as pilot in command · 58 in the last 90 days · 40 in the last 30 days · 9 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
30° at 8 knots, gusting 17
Visibility
10 statute miles
Lowest ceiling
4,800 ft broken
Temperature
64 °F, dew point 45 °F
Altimeter
30.22 inHg
Observed at
BFI

Docket · 1

The files NTSB released with the investigation on June 18, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 499 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.