ERA23LA271

NTSB accident investigation · Cessna 172 · Seymore, TN · June 18, 2023

Accident · Minor injuriesClass 4 · LimitedFinal report
Date
June 18, 2023, 08:00 local (12:00 UTC)
Place
Seymore, TN
Injuries
3 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N12395Cessna 172
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
Case key
192401

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 flight instructor’s failure to properly configure the wing flaps for a soft-field takeoff on a short runway, which resulted in a runway overrun and collision with trees.

Findings · 2

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.

Action: incorrect action selectionPersonnel issues › Action/decision · Instructor/check pilotCessna 172M: 6 casesAll aircraft: 397 casesProbable cause
Wing structure: trailing edge flapsAircraft › Aircraft structures · Incorrect use/operationCessna 172M: 2 casesAll aircraft: 33 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 flight instructor stated that he was teaching the student pilot a soft-field takeoff technique on a 2,300-ft-long turf runway, with a passenger in the back seat. The flight instructor further stated that student pilot lifted off the airplane at 52 knots, but it settled back to the runway as the wind shifted from a headwind to a tailwind. The airplane then traveled about 100 ft beyond the departure end of the runway and struck bushes, coming to rest upright. The flight instructor added that there were no preimpact mechanical malfunctions with the airplane. Examination of the wreckage by a Federal Aviation Administration inspector revealed substantial damage to the left wing and fuselage. The inspector noted that the flaps were in the fully retracted position and asked the flight instructor why he did not perform the accident takeoff with 10° flap extension, per the owner’s manual. The flight instructor replied that was always how he performed soft-field takeoffs. The recorded wind speed about the time of the accident was 3 knots.

Aircraft

Registration
N12395
Reported as
Cessna 172 (M)
Category
Airplane
Serial number
17261968
Built
1973
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Airworthiness certificate
Standard, Normal
Airport
TN20 · Seymour Air Park, runway 25, 2,300 × 100 ft, grass/turf
Equipment
ADS-B, Electronic primary flight display, 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
74
Injuries
Minor
Certificates
Flight engineer, Airline transport, Flight instructor, Commercial, Military
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
May 20, 2023
Seat
Front
Restraint
Lap only
Flight hours
30,000 total · 15,000 in this make and model · 20,000 as pilot in command · 100 in the last 90 days · 30 in the last 30 days · 3 in the last 24 hours
Role
Student pilot
Injuries
Minor
Certificate
Student
Medical
Class 3, Without waivers/limitations
Seat
Left
Restraint
Lap only
Flight hours
52 total · 48 in this make and model · 8 as pilot in command · 9 in the last 90 days · 5 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 3 knots
Visibility
8 statute miles
Lowest ceiling
25,000 ft broken
Temperature
64 °F, dew point 57 °F
Altimeter
29.94 inHg
Observed at
TYS, 10 nm away
METAR
KTYS 181153Z 07003KT 8SM BKN250 18/14 A2994

Docket · 5

The files NTSB released with the investigation on September 8, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.6 MB in all.

Other investigations on N12395 · 1

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