CEN18LA123

NTSB accident investigation · Mills Michael S1L · Dewitt, MI · March 22, 2018

Accident · FatalLimited investigationFinal report
Date
March 22, 2018, 18:30 local (22:30 UTC)
Place
Dewitt, MI
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N197XMills Michael S1L
Defining event
Approach: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report December 16, 2019
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20180322009899A
Case key
96887

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 see and avoid power lines due to sun glare.

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.

Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Effect on personnelMills Michael S1L: 1 caseAll aircraft: 109 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Effect on operationMills Michael S1L: 1 caseAll aircraft: 588 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 commercial pilot was attempting to land on an airstrip on his property, but on short final, the airplane struck power lines and then descended and impacted terrain. Examination of the airframe, engine, and related systems revealed no evidence of any mechanical malfunctions or failures that would have precluded normal operation. Before the accident flight, the pilot told a friend that he needed to return home before a certain time or there would be a problem with sun glare during landing. The pilot was approaching his airstrip on a westerly heading. The position of the sun was 14° above the horizon and about 20° left of the pilot's vision. The position of the sun likely hampered the pilot's ability to see the power lines, which resulted in his failure to avoid them.

Factual narrative

On March 22, 2018, about 1830 eastern daylight time, an amateur-built Star-Lite S1L airplane, N197X, collided with power lines while attempting to land at a private airstrip near Dewitt, Michigan. The pilot initially survived the accident but later succumb to his injuries. The airplane was substantially damaged. The airplane was registered to and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed and no flight plan was filed for the flight. While on short final to the pilot's private airstrip, landing to the west, the airplane collided with power lines about 200 ft short of the runway. The airplane then descended and impacted terrain. According to information obtained by the responding Federal Aviation Administration (FAA) inspector, prior to the accident, the pilot flew to another airport to visit a friend. The friend stated that the pilot said he needed to leave by a certain time, or he would have problems with sun glare during landing to his private strip. An autopsy was conducted on the pilot by the Sparrow Forensic Pathology. The autopsy noted an enlarged heart with left ventricular hypertrophy and very mild coronary artery disease. The cause of death is multiple blunt force injures. The manner of death was ruled an accident. The FAA Bioaeronautical Science Research Laboratory, Oklahoma City, Oklahoma, performed toxicology testing on specimens collected from the pilot. Testing was negative for all tested substances. The position of the sun at the time of the accident was 14° above the horizon at a relative azimuth of 257° to the pilot during the approach. The airplane impacted a field east of the airstrip. The fuselage and both wings were wrinkled and deformed. An examination of the airplane by the FAA inspector confirmed flight control continuity to from the cockpit controls to the respective flight control surfaces. No anomalies were detected with the airframe or engine which would have precluded normal operation of the airplane.

Aircraft

Registration
N197X
Reported as
Mills Michael S1L (NO SERIES)
Category
Airplane, amateur-built
Serial number
540
Built
2015
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
Dewitt, MI
Destination
Dewitt, MI
Flight plan
VFR

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
69
Injuries
Fatal
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Flight hours
17,100 total

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
43 °F, dew point 12 °F
Altimeter
30.21 inHg
Observed at
KLAN, 9 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.