WPR09CA300

NTSB accident investigation · North American/Victoria MNT LT AT-6A · Olympia, WA · June 20, 2009

Accident · No injuriesData collectionFinal report
Date
June 19, 2009, 19:15 local (Jun 20, 2009, 02:15 UTC)
Place
Olympia, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9793ZNorth American/Victoria MNT LT AT-6A
Defining event
Landing-flare/touchdown: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report September 10, 2009
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20090619009649A
Case key
74086

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 gust and failure to maintain directional control while landing.

Findings · 5

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: crosswind correctionAircraft › Aircraft oper/perf/capability · Incorrect use/operationNorth American/Victoria MNT LT AT-6A: 1 caseAll aircraft: 184 casesProbable cause
Object/animal/substance: sign/markerEnvironmental issues › Physical environment · Contributed to outcomeNorth American/Victoria MNT LT AT-6A: 1 caseAll aircraft: 214 cases
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Response/compensationNorth American/Victoria MNT LT AT-6A: 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

While making a three-point landing in his tailwheel-equipped airplane, the pilot encountered a strong crosswind gust about the same time that he was initiating the landing flare. Because the pilot was unable to compensate for the wind gust, the airplane touched down with its right main landing gear beyond the right edge of the runway. The pilot saw that the airplane was approaching a runway sign, so he added power in order to execute a go-around, but the right wing impacted the sign before he could get it airborne. Immediately after the airplane impacted the sign, the pilot cut the power and aborted the go-around. The airplane's right wing and its fuselage both sustained substantial damage. The pilot stated that there were no problems with any of the airplane's control systems. The reported wind conditions included wind gusts up to 18 knots at the time of the accident.

Factual narrative

While making a three-point landing in his tailwheel-equipped airplane, the pilot encountered a strong crosswind gust about the same time as he was initiating the landing flare. Because the pilot was unable to compensate for the wind gust, the airplane touched down with its right main landing gear beyond the right edge of the runway. The pilot saw that the airplane was approaching a runway sign, so he added power in order to execute a go-around, but the right wing impacted the sign before he could get it airborne. Immediately after the airplane impacted the sign, the pilot cut the power and aborted the go-around. The airplane's right wing and its fuselage both sustained substantial damage. The pilot stated that there were no problems with any of the airplane's control systems. The reported wind conditions included wind gusts up to 18 knots at the time of the accident.

Aircraft

Registration
N9793Z
Reported as
North American/Victoria MNT LT AT-6A
Category
Airplane
Serial number
75-3048
Airframe hours
8,261
Engine
Pratt & Whitney R1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Koelbel John D
Registered owner
Koelbel John D
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 17, 2009
Departed
KELN · Elllensburg, WA
Destination
KOLM · Olympia, WA
Airport
KOLM · Olympia, runway 26, 4,157 × 150 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
65
Injuries
Minor
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
July 8, 2008
Seat
Front
Flight hours
7,000 total · 300 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 11 knots, gusting 18
Visibility
10 statute miles
Lowest ceiling
5,000 ft broken
Temperature
61 °F, dew point 52 °F
Altimeter
29.90 inHg
Observed at
KOLM

Docket · 1

The files NTSB released with the investigation on July 24, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 579 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.