CEN20CA404

NTSB accident investigation · Cubcrafters CC11 · Larkspur, CO · September 18, 2020

Accident · No injuriesClass 4 · Data collectionFinal report
Date
September 18, 2020, 10:43 local (16:43 UTC)
Place
Larkspur, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N55JVCubcrafters CC11
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20200918016189A
Case key
102004

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 failure to maintain control of the airplane while taking off in gusting quartering tailwind 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/maintainedCubcrafters CC11-160: 14 casesAll aircraft: 3,958 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationCubcrafters CC11-160: 1 caseAll aircraft: 594 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCubcrafters CC11-160: 13 casesAll aircraft: 9,295 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 while taking off from a downhill sloped meadow, the airplane encountered a strong quartering tailwind gust, which stopped the airplane from climbing. The airplane subsequently sank, and the left wing struck the ground. The airplane’s left wing and fuselage sustained substantial damage. The pilot reported that there were no preaccident mechanical failures or malfunctions that would have precluded normal operation. The pilot reported that the accident could have been prevented if he had selected a better takeoff site with more options in case of unexpected adverse conditions.

Aircraft

Registration
N55JV
Reported as
Cubcrafters CC11 (160)
Category
Airplane, amateur-built
Serial number
CC11-00392
Built
2015
Airframe hours
430.7
Engine
Titan OC-340CC, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Janzen Leasing LLC
Registered owner
Janzen Leasing LLC
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · August 26, 2020

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
66
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
May 6, 2020
Seat
Rear
Flight hours
7,836 total · 114 in this make and model · 7,806 as pilot in command · 116 in the last 90 days · 34 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 32 °F
Altimeter
30.35 inHg
Observed at
KAFF, 11 nm away

Docket · 2

The files NTSB released with the investigation on September 2, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.3 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 N55JV · 1

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