CEN21LA083

NTSB accident investigation · Cessna 172 · Glencoe, MN · December 10, 2020

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
December 9, 2020, 18:30 local (Dec 10, 2020, 00:30 UTC)
Place
Glencoe, MN
Injuries
1 serious, 1 uninjured; on the ground: 1 serious
Damage
No damage
Phase of flight
Standing
Aircraft
N1956VCessna 172
Defining event
Standing-engine(s) operating: AC/prop/rotor contact w person
Weather
Visual (VMC) · Night
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA Flight Standards
FAA report
20201209017819A
Case key
102398

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

A bystander’s inadvertent contact with the propeller while the engine was running.

Findings · 1

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.

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 made a fuel stop as part of a solo cross-country flight. The pilot’s mother and sister had come out to the airport to visit. After fueling the airplane, his mother and sister returned to their car. The pilot conducted his preflight, started the engine, and was completing the checklist when he “heard and felt a violent thud.” He looked up to see his mother “sprinting towards the car.” The pilot shutdown the airplane. The pilot’s mother had returned to the airplane unexpectedly and was struck by the propeller resulting in a serious injury to her left arm. The airplane exhibited no obvious damage.

Aircraft

Registration
N1956V
Reported as
Cessna 172 (S)
Category
Airplane
Serial number
172S9934
Built
2005
Airframe hours
5,988
Engine
Lycoming IO-360-L2A, 180 horsepower, reciprocating
Damage
No damage
Flight
Instructional · Part 91
Operator
South Dakota State University
Registered owner
Medary Aviation LLC
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Continuous airworthiness · November 23, 2020 · 25 hours before
Destination
BKX · Brookings, SD
Flight plan
VFR
Airport
GYL · Glencoe Municipal
Equipment
Electronic multifunction display, Auto-pilot, Electronic primary flight display, ADS-B, Stall warning system

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
22
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
August 3, 2020
Seat
Left
Restraint
3-point
Flight hours
161 total · 136 in this make and model · 112 as pilot in command · 35 in the last 90 days · 9 in the last 30 days

Weather

Conditions
Visual (VMC) · Night
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
2 °F, dew point -3 °F
Altimeter
29.95 inHg
Observed at
GYL

Docket · 1

The files NTSB released with the investigation on July 7, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 493 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.