GAA18CA494

NTSB accident investigation · Piper PA18 · Gilliam Glacier, AK · August 12, 2018

Accident · No injuriesData collectionFinal report
Date
August 12, 2018, 14:30 local (22:30 UTC)
Place
Gilliam Glacier, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N9884DPiper PA18
Defining event
Initial climb: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report February 11, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180812010989A
Case key
98095

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 improper decision to take off in gusting crosswind conditions, which resulted in a loss of control and collision with terrain.

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 parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-150: 14 casesAll aircraft: 1,269 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18-150: 160 casesAll aircraft: 9,295 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 34 casesAll aircraft: 1,199 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 13 casesAll 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 of the tailwheel-equipped airplane reported that the weather conditions were "gusty winds with intermittent rain" and that a quartering headwind existed at the airstrip. During initial climb, a wind gust forced the airplane back into ground effect, and another gust forced the airplane back onto the airstrip. The right main landing gear collapsed, the right wing struck the ground, and the airplane came to rest nose down. The airplane sustained substantial damage to the fuselage and wings. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot reported that the wind was variable at 5 knots, gusting to 22 knots. The pilot reported that the accident could have been prevented if he had waited for "calmer conditions."

Factual narrative

The pilot of the tailwheel equipped airplane reported that the weather conditions were "gusty winds with intermittent rain," and the wind was a quartering headwind at the remote airstrip. During takeoff initial climb, a "gust of wind" forced the airplane back into ground effect and an additional gust forced the airplane back onto the airstrip. The right main landing gear collapsed, the right wing struck the ground, and the airplane came to rest nose down. The airplane sustained substantial damage to the fuselage and wings. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The nearest automated weather observation station located at an airport 41 nautical miles from the accident site reported that, about 30 minutes prior the accident, the wind was from 170° true at 34 knots, gusting 45 knots. The pilot reported the wind was variable, 5 knots, gusting 22 knots. The pilot departed to the north. The pilot reported that the accident could have been prevented if he had waited for "calmer conditions."

Aircraft

Registration
N9884D
Reported as
Piper PA18 (150)
Category
Airplane
Serial number
18-6905
Built
1959
Airframe hours
3,553.2
Engine
Lycoming O-320-E3D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Restricted (Special); Standard, Normal
Last inspection
Annual · October 27, 2017
Departed
Gilliam Glacier, AK
Destination
FAI · Fairbanks, AK
Equipment
Handheld GPS, Satellite tracking device

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
25
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
February 10, 2018
Seat
Front
Restraint
4-point
Flight hours
613 total · 575 in this make and model · 563 as pilot in command · 51 in the last 90 days · 15 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 16 knots, gusting 34
Visibility
10 statute miles
Lowest ceiling
13,000 ft overcast
Temperature
64 °F, dew point 48 °F
Altimeter
29.64 inHg
Observed at
PABI, 41 nm away

Docket · 2

The files NTSB released with the investigation on October 17, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 999 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 N9884D · 2

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