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NTSB accident investigation · Stump Great Lakes 2T 1A · Monongahela, PA · February 22, 2017

Accident · No injuriesData collectionFinal report
Date
February 22, 2017, 10:00 local (15:00 UTC)
Place
Monongahela, PA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N305YStump Great Lakes 2T 1A
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report July 20, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20170222006489A
Case key
94831

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot’s failure to maintain directional control of the airplane during the landing roll with crosswind conditions.

Findings · 3

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/maintainedStump Great Lakes 2T-1A-E: 1 caseAll aircraft: 3,958 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationStump Great Lakes 2T-1A-E: 1 caseAll aircraft: 1,008 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 of a tailwheel-equipped airplane reported that the airplane veered to the right and then left. He corrected the veer to the right but "didn't get on it quick enough to stop the turn." The airplane continued to the left and ground looped. A postaccident examination revealed that the airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station on the airport reported that, about the time of the accident, the wind was from 190° at 6 knots. The pilot landed on runway 26.

Factual narrative

The pilot of a tailwheel-equipped airplane reported that, the airplane veered to the right and then left. He corrected the veer to the right, but "didn't get on it quick enough to stop the turn." The airplane continued to the left and ground looped. A postaccident examination revealed that, the airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station on the airport, about the time of the accident, reported that, the wind was from 190° at 6 knots. The pilot landed on runway 26.

Aircraft

Registration
N305Y
Reported as
Stump Great Lakes 2T 1A (E)
Category
Airplane, amateur-built
Serial number
6825A-358
Built
1973
Airframe hours
464.6
Engine
Franklin 6A-350-C2, 215 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Aerobatic; Special, Experimental (Special)
Last inspection
Condition · February 22, 2017
Departed
FWQ · Monongahela, PA
Destination
FWQ · Monongahela, PA
Airport
FWQ · Rostraver, runway 26, 4,002 × 75 ft, asphalt
Equipment
Unknown

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
77
Injuries
None
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 1, With waivers/limitations
Last flight review
August 16, 2016
Seat
Rear
Restraint
4-point
Flight hours
20,330 total · 100 in this make and model · 17,500 as pilot in command · 26 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 6 knots
Visibility
10 statute miles
Lowest ceiling
7,000 ft overcast
Temperature
57 °F, dew point 39 °F
Altimeter
29.95 inHg
Observed at
KAGC, 10 nm away

Docket · 2

The files NTSB released with the investigation on July 6, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.6 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.

Other investigations on N305Y · 1

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