ERA24LA059

NTSB accident investigation · Cessna 172 · Zephyrhills, FL · December 7, 2023

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
December 7, 2023, 12:48 local (17:48 UTC)
Place
Zephyrhills, FL
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N906KSCessna 172
Defining event
Initial climb: Aerodynamic stall/spin
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20231207017049A
Case key
193495

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

An aerodynamic stall from which the pilots did not recover while maneuvering in the airport traffic pattern.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · Student/instructed pilotCessna 172N: 150 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: angle of attackAircraft › Aircraft oper/perf/capability · Capability exceededCessna 172N: 13 casesAll aircraft: 990 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · Instructor/check pilotCessna 172N: 150 casesAll aircraft: 9,295 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

A student pilot was practicing touch-and-go landings with his flight instructor. An airport surveillance video showed the airplane flying about 50 ft above ground level in a nose high, left wing low attitude. The left bank continued to steepen, the airplane’s nose pitched downward, and the airplane began descending steeply toward the ground in a manner consistent with the airplane entering an aerodynamic stall. Due to their injuries, the student pilot could not recall what occurred during the third touch-and-go landing, while the flight instructor was unable to provide any recollection of the flight. Examination of the airplane did not reveal evidence of any preimpact anomalies that would have precluded normal operation of the airplane. Based on the available information, it is likely that the airplane encountered an aerodynamic stall from which the pilots did not recover while maneuvering in the airport traffic pattern.

Factual narrative

On December 7, 2023, about 1248 eastern standard time, a Cessna 172N, N906KS, was substantially damaged when it was involved in accident near Zephyrhills, Florida. The flight instructor and student pilot were seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 instructional flight. According to the student pilot, he had about 11 hours of total flight experience. He stated that he and the flight instructor flew from Lakeland Linder International Airport (LAL), Lakeland, Florida, to Zephyrhills Municipal Airport (ZPH), Zephyrhills, Florida, to practice some touch-and-go landings on runway 5. The flight instructor demonstrated the first touch-and-go landing. The student pilot recalled performing the second touch-and-go landing but did not remember what occurred during the third touch-and-go landing. He recalled waking up in the hospital. Due to his injuries, the flight instructor was unable to provide a statement. An airport surveillance video showed the airplane flying about 50 ft above ground level in a nose high, left wing low attitude. The left bank continued to steepen, the airplane’s nose pitched downward, and the airplane began descending steeply toward the ground. Initial examination of the wreckage by a Federal Aviation Administration inspector revealed that it came to rest on the left side of runway 5. The left wing and engine mounts sustained substantial damage. The airplane was subsequently examined after it was recovered from the accident site. Continuity of the flight control cables was traced through separations that were consistent with overload or cuts that were made by recovery personnel to facilitate transportation of the wreckage. All of the primary flight controls were free to move by hand, and felt smooth through those movements. The top spark plugs of the engine were removed and the propeller was rotated by hand; thumb compression was established on all cylinders. Engine powertrain and valvetrain continuity were verified to the rear accessory section of the engine. Both magnetos produced spark on all leads when their input drives were rotated by an electric drill. The carburetor was opened for examination; it was clean and clear of debris. No anomalies were noted with either the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N906KS
Reported as
Cessna 172 (N)
Category
Airplane
Serial number
17272697
Built
1979
Airframe hours
9,883
Engine
Lycoming O-360-A4M, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Kingsky Flight Academy LLC
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 10, 2023
Destination
LAL · Lakeland, FL
Airport
ZPH · Zephyrhills Muni, runway 05, 5,001 × 100 ft, asphalt
Equipment
Electronic multifunction display, Electronic flight bag or handheld device, 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
33
Injuries
Serious
Certificate
Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
August 24, 2023
Seat
Right
Restraint
3-point
Flight hours
500 total
Role
Student pilot
Age
22
Injuries
Serious
Medical
Class 1, Without waivers/limitations
Seat
Left
Restraint
3-point
Flight hours
11.3 total · 11.3 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 46 °F
Altimeter
30.21 inHg
Icing
Clear
Observed at
ZPH

Docket · 6

The files NTSB released with the investigation on September 18, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.9 GB 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.