ERA22LA006

NTSB accident investigation · Cessna 172K · Williston, FL · October 6, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
October 5, 2021, 20:45 local (Oct 6, 2021, 00:45 UTC)
Place
Williston, FL · KX60 Airport
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N78604Cessna 172K
Weather
Visual (VMC) · Night/dark
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
FAA report
20211005020139A
Case key
104071

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 pilot’s failure to maintain clearance from terrain on approach which resulted in controlled flight into trees. Contributing to the accident was the flight instructor’s inadequate supervision of the approach path, the dark night conditions and the landing light being off.

Findings · 7

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: darkEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeCessna 172K: 4 casesAll aircraft: 448 casesProbable cause
Light condition: darkEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 172K: 4 casesAll aircraft: 448 casesProbable cause
Info processing/decision: understanding/comprehensionPersonnel issues › Action/decision · Student/instructed pilotCessna 172K: 1 caseAll aircraft: 70 casesProbable cause
Attention/monitoring: monitoring other personPersonnel issues › Psychological · Instructor/check pilotCessna 172K: 2 casesAll aircraft: 200 casesProbable cause
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 172K: 4 casesAll aircraft: 809 casesProbable cause
Attention/monitoring: monitoring environmentPersonnel issues › Psychological · Student/instructed pilotCessna 172K: 3 casesAll aircraft: 809 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Effect on equipmentCessna 172K: 3 casesAll aircraft: 933 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

During a night instructional flight, the flight instructor simulated an engine failure while on the downwind leg of the traffic pattern. As the airplane approached the runway with the landing light off, the flight instructor noticed that they were low on the approach. When the instructor asked the student if the landing light was on, the student pilot promptly answered “no” and turned it on. The airplane struck trees at the same moment, which resulted in substantial damage to the wings and tail. A review of meteorological and astronomical data revealed there was a broken cloud layer at 6,000 feet above ground level and the phase of the moon was a waning crescent with 1% of the Moon’s visible disk illuminated. Further review indicated that the Moon had set about 1 hour and 43 minutes prior to the accident. The pilot reported no mechanical malfunctions or anomalies that would have precluded normal operation.

Aircraft

Registration
N78604
Reported as
Cessna 172K
Category
Airplane
Serial number
17257683
Built
1968
Airframe hours
4,341
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Ocala Aviation Services Inc, doing business as Ocala Aviation Flight Training Center
Registered owner
Ocala Aviation Services Inc
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
100 hour · September 14, 2021
Departed
OCF · Ocala, FL
Destination
X60 · Williston, FL
Airport
X60 · Williston Muni, runway 5, 6,669 × 100 ft, concrete
Equipment
Electronic flight bag or handheld device, ADS-B, Electronic primary flight display

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
28
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
August 4, 2020
Seat
Right
Restraint
4-point
Flight hours
623 total · 534 in this make and model · 593 as pilot in command · 90 in the last 90 days · 13 in the last 30 days · 13 in the last 24 hours
Role
Student pilot
Age
17
Injuries
None
Certificate
Student
Medical
Class 3, Without waivers/limitations
Seat
Left
Restraint
4-point
Flight hours
30 total · 30 in this make and model · 8 as pilot in command

Weather

Conditions
Visual (VMC) · Night/dark
Wind
Calm
Visibility
8 statute miles
Lowest ceiling
6,000 ft broken
Temperature
77 °F, dew point 72 °F
Altimeter
30.04 inHg
Observed at
KOCF, 17 nm away
METAR
KOCF 060051Z AUTO 00000KT 8SM -RA BKN060 BKN120 25/22 A3004 RMK AO2 RAB43 SLP171 P0000 T02500222

Docket · 4

The files NTSB released with the investigation on May 18, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 13.0 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.