GAA18CA269

NTSB accident investigation · Piper PA 18-150 · Goose Bay, AK · May 7, 2018

Accident · No injuriesData collectionFinal report
Date
May 7, 2018, 15:00 local (23:00 UTC)
Place
Goose Bay, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N2432HPiper PA 18-150
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180507004829A
Case key
97223

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 student pilot’s failure to maintain directional control during landing with a gusting tailwind.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · Student/instructed pilotPiper PA-18-150: 160 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-150: 98 casesAll aircraft: 3,958 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 15 casesAll aircraft: 594 cases
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 34 casesAll aircraft: 1,199 cases
Runway/land/takeoff/taxi surface: soft surfaceEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18-150: 10 casesAll aircraft: 264 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

According to the student pilot in the tailwheel-equipped airplane, during his initial solo flight in the airport traffic pattern, he performed a go-around because "I did not like my approach." Following the next approach, he recalled that the airplane encountered a left crosswind gust when the airplane touched down on the gravel runway. He believed that the wind had shifted, and the airplane's tail was "blown" to the right, and its nose turned to the left. The airplane moved from the crown of the runway onto the down-sloping runway edge, and the tailwheel entered the soft gravel. The right wing tip then struck the ground, and the airplane exited the left side of the runway before it came to rest. The airplane sustained substantial damage to the right wing spar. The nearest METAR, located 9 miles south of the accident site, reported that, about the time of the accident, the wind was from 280° at 7 knots. The airplane landed on runway 8. The pilot reported that the wind at the time of the accident was variable at 6 knots, gusting to 10 knots. The student reported that, "I should have caught that there had been a wind shift between my touch and go and when I ground looped my aircraft. In preparation for landing a final check of the windsock needs to be done, every time. If there is a crosswind, a wing low approach would have helped avoid losing control of the aircraft when I touched down." The student reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

According to the student pilot in the tailwheel-equipped airplane, during his initial solo-flight in the airport traffic pattern, he performed a go-around because "I did not like my approach". Following his next approach, he recalled that the airplane encountered a crosswind gust from the left, when the airplane touched down on the gravel runway. He believed that the wind had shifted, and the airplane's tail was "blown" to the right and the nose of the airplane turned to the left. The airplane moved from the crown of the runway onto down sloping edge and the tailwheel entered the soft gravel. The weight of the airplane shifted in the direction of the airplane's momentum and the right wing tip struck the ground. The airplane exited the left side of the runway before it came to rest. The airplane sustained substantial damage to the right wing spar. The nearest METAR was 9 miles south of the accident site and reported that about the time of the accident, the wind was from 280° at 7 knots. The airplane landed on runway 8. The pilot reported that the wind at the time of the accident was variable at 6 knots, and gusting to 10 knots. Per the National Transportation Safety Board, Pilot Aircraft Accident Report, in the Recommendation section, the student pilot asserted that, "I should have caught that there had been a wind shift between my touch and go and when I ground looped my aircraft. In preparation for landing a final check of the windsock needs to be done, every time. If there is a crosswind, a wing low approach would have helped avoid losing control of the aircraft when I touched down." The student pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N2432H
Reported as
Piper PA 18-150 (150)
Category
Airplane
Serial number
18-7909184
Built
1979
Airframe hours
5,214.63
Engine
Lycoming O320A2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 25, 2017
Departed
PALH · Anchorage, AK
Destination
Z40 · Goose Bay, AK
Airport
Z40 · Goose Bay, runway 08, 3,000 × 75 ft, gravel
Equipment
Stall warning system, Electronic flight bag or handheld device, Handheld GPS

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
33
Injuries
None
Certificate
Student
Medical
Class 3, With waivers/limitations
Seat
Front
Restraint
4-point
Flight hours
114 total · 20 in this make and model · 14 as pilot in command · 10 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 7 knots
Visibility
10 statute miles
Temperature
50 °F, dew point 27 °F
Altimeter
30.12 inHg
Observed at
PAED, 9 nm away

Docket · 2

The files NTSB released with the investigation on October 29, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.7 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.