CEN11LA328

NTSB accident investigation · Piper PA-18 · Fredenberg Township, MN · May 7, 2011

Accident · No injuriesLimited investigationFinal report
Date
May 7, 2011, 12:30 local (17:30 UTC)
Place
Fredenberg Township, MN
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N195TPiper PA-18
Defining event
Landing-flare/touchdown: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report February 6, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration - Minneapolis
FAA report
20110507008569A
Case key
79068

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 directional control during a crosswind 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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18: 12 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18: 21 casesAll aircraft: 9,295 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Ability to respond/compensatePiper PA-18: 3 casesAll aircraft: 1,008 cases
Object/animal/substanceEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18: 1 caseAll aircraft: 224 cases
Terrain: wet/muddy terrainEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18: 1 caseAll aircraft: 110 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 was attempting to land on an island sandbar with a 6- to 8-knot left crosswind. He stated that he had previously performed the same landing in the accident airplane, which was equipped with oversized tundra tires. As the airplane descended below the nearby treetops, the crosswind component diminished, and the airplane began drifting left of the desired landing path. Shortly after touchdown, the left wingtip collided with shrubs and trees, which caused the airplane to veer into a marsh area. The right main landing gear sunk into the soft terrain, and the right wing impacted terrain. The pilot reported that there were no preimpact mechanical malfunctions or failures that would have precluded normal operation of the airplane.

Factual narrative

On May 7, 2011, at 1230 central daylight time, a Piper model PA-18 airplane, N195T, was substantially damaged while landing on Tin Can Island in the Island Lake Reservoir, near Fredenberg Township, Minnesota. The pilot and passenger were not injured. The airplane was registered to and operated by the private pilot, under the provisions of 14 Code of Federal Regulations Part 91. Day visual meteorological conditions prevailed for the flight, which was operated without a flight plan. The personal flight originated from the pilot's private airstrip in Duluth, Minnesota, around 1200. The pilot reported that he was attempting a southerly landing on a sandbar located on the west side of the island. He noted that he had previously performed the same landing in the accident airplane, which was equipped with oversized tundra tires. He stated that there was a 6-8 knot left crosswind during the landing approach. As the airplane descended below the treetops, the crosswind component diminished and the airplane began drifting left of the desired landing path. Shortly after touchdown the left wingtip collided with shrubs and trees which caused the airplane to veer away from the sandbar and into a marsh area. The right main landing gear sunk into the soft terrain and the right wing impacted terrain. A postaccident inspection revealed substantial damage to the right wing and the fuselage structure. The pilot reported that there were no preimpact mechanical malfunctions or failures that would have precluded normal operation of the airplane. The nearest aviation weather observation station with recorded historical weather information was at Duluth International Airport (KDLH), about 12.5 miles south of the accident site, which was equipped with an automated surface observing system (ASOS). At 1255, the KDLH ASOS reported the following weather conditions: wind 100 degrees at 9 knots; visibility 10 miles; few clouds at 4,000 feet above ground level; temperature 13 degrees Celsius; dew point 3 degrees Celsius; altimeter setting 29.87 inches of mercury.

Aircraft

Registration
N195T
Reported as
Piper PA-18
Category
Airplane
Serial number
18-2309
Airframe hours
4,892
Engine
Lycoming O-235-C1, 105 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 20, 2010
Departed
PVT · Duluth, MN
Destination
Fredenberg Township, MN

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
48
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
August 30, 2010
Seat
Front
Flight hours
500 total · 200 in this make and model · 22 in the last 90 days · 10 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 37 °F
Altimeter
29.87 inHg
Observed at
KDLH, 11 nm away

Docket · 4

The files NTSB released with the investigation on December 14, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 418 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.