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NTSB accident investigation · Grosch Starduster TOO · Lincoln, CA · June 28, 2019

Accident · No injuriesData collectionFinal report
Date
June 28, 2019, 14:00 local (21:00 UTC)
Place
Lincoln, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N2RGGrosch Starduster TOO
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20190628008389A
Case key
99884

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 improper landing flare, which resulted in a hard landing, subsequent loss of directional control, runway excursion, and ground-loop.

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: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedGrosch STARDUSTER TOO SA-30: 1 caseAll aircraft: 1,285 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedGrosch STARDUSTER TOO SA-30: 2 casesAll aircraft: 3,958 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 reported that, during the third landing that day, the biplane landed hard and veered off the left side of the runway. The airplane ground looped, and the left main landing gear collapsed. The pilot added that he thought the tailwheel was swiveling but not turning with the rudder. While working on repairs, he observed that the shear pins on the tailwheel had sheared off. The airplane sustained substantial damage to the lower right wing. The airplane was not made available to the National Transportation Safety Board for examination, so the reason for the anomaly reported by the pilot could not be determined.

Factual narrative

The pilot reported that, during the third landing, the biplane landed hard and veered off the left side of the runway. The airplane ground looped and the left main landing gear collapsed. He added that he thought the tailwheel was swiveling, but not turning with the rudder. While working on repairs, he observed that the shear pins on the "Mollie heavy duty tailwheel" sheared off, which resulted in the tailwheel not working properly. The airplane sustained substantial damage to the lower right wing. The airport's automated weather observation station reported that, about 8 minutes before the accident, the wind was from 200° at 3 knots. The pilot landed the airplane on runway 15. The airplane was not made available to the Federal Aviation Administration or the National Transportation Safety Board for examination.

Aircraft

Registration
N2RG
Reported as
Grosch Starduster TOO (SA-30)
Category
Airplane, amateur-built
Serial number
563
Built
2014
Airframe hours
99
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Destination
LHM · Lincoln, CA
Flight plan
Unknown
Airport
LHM · Lincoln Rgnl/Karl Harder Field, runway 15, 6,001 × 100 ft, asphalt
Equipment
None

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
87
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 39 °F
Altimeter
29.98 inHg
Observed at
KLHM

Docket · 3

The files NTSB released with the investigation on September 24, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 463 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 N2RG · 1

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