CEN20CA139

NTSB accident investigation · Rans S-12 Airaile · Hillrose, CO · April 4, 2020

Accident · Serious injuriesData collectionFinal report
Date
April 4, 2020, 10:44 local (16:44 UTC)
Place
Hillrose, CO
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
UNREGRans S-12 Airaile
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report August 27, 2020
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration; Denver FSDO
Case key
101142

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 noncertificated pilot's diverted attention while looking at a fire during low-altitude flying, which resulted in a collision with power lines.

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.

Experience/qualifications: qualification/certificationPersonnel issues › Experience/knowledge · PilotAll aircraft: 280 casesProbable cause
Attention/monitoring: attentionPersonnel issues › Psychological · PilotAll aircraft: 226 casesProbable cause
Attention/monitoring: monitoring environmentPersonnel issues › Psychological · PilotAll aircraft: 809 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Effect on operationAll aircraft: 588 casesProbable cause
Maintenance/inspectionsAircraft › Aircraft handling/service · Not specifiedAll aircraft: 103 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 noncertificated pilot reported that, during a local flight, he noticed an area of smoke and fire near his property. The pilot descended the airplane to about 20 ft above ground level to see what was burning, which diverted his attention from flying. The pilot "immediately" pulled up to avoid power lines, but the airplane struck the lines. The airplane then impacted the ground and came to rest inverted, which resulted in substantial damage to the wings and empennage. The pilot reported that there were no preaccident mechanical malfunctions or failures of the airplane that would have precluded normal operation.

Factual narrative

The noncertificated pilot and his son departed in the unregistered experimental airplane (previously N4114G), on a local personal flight from his private airstrip. During the return flight, they noticed an area of smoke and fire near the pilot's property and proceeded to the area for examination. The pilot descended the airplane to an altitude of about 20 ft above ground level to see what was burning, which diverted the pilot's attention. The pilot "immediately" pulled up to avoid powerlines, "but was 2 seconds late," and the airplane struck the powerlines. The pilot report that there were no mechanical malfunctions or failures of the airplane that would have precluded normal operations.

Aircraft

Registration
UNREG
Reported as
Rans S-12 Airaile
Category
Airplane, amateur-built
Serial number
1290044
Built
1990
Airframe hours
505.4
Engine
Rotax 582, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Pilot
Registered owner
Pilot
Airworthiness certificate
Special, Experimental (Special)
Departed
Hillrose, CO
Destination
Hillrose, CO
Equipment
Stall warning system

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
58
Injuries
Serious
Flight hours
680 total · 135 in this make and model · 680 as pilot in command · 12 in the last 90 days · 3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 28 °F
Altimeter
29.80 inHg
Observed at
FMM, 60 nm away

Docket · 3

The files NTSB released with the investigation on June 29, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 837 KB in all.