ERA22FA036

NTSB accident investigation · Vans RV4 · Chattahoochee, FL · October 31, 2021

Accident · FatalClass 3 · FieldFinal report
Date
October 31, 2021, 13:20 local (17:20 UTC)
Place
Chattahoochee, FL
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N479JJVans RV4
Defining event
Enroute-cruise: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
Lycoming, FAA
FAA report
20211031018269A
Case key
104184

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 properly secure the canopy before takeoff, allowing the canopy to open and then separate in flight, which resulted in the pilot’s failure to maintain control of the airplane for reasons that could not be determined based on the available evidence.

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.

Windows-windshield system: flight compartment windowsAircraft › Aircraft structures · Incorrect use/operationJewell Jacob L RV 4: 1 caseAll aircraft: 42 casesProbable cause
Action: incorrect action performancePersonnel issues › Action/decision · PilotJewell Jacob L RV 4: 1 caseAll aircraft: 1,386 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotJewell Jacob L RV 4: 1 caseAll 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

The pilot departed the airport for a cross country flight. Shortly after departure, radar services were terminated by air traffic control and the pilot was cleared for a radio frequency change. Seventeen minutes later, radar contact was lost. Automatic dependent surveillance-broadcast data obtained from the Federal Aviation Administration revealed the airplane climbed to about 2,500 ft mean sea level and made a few turns to the north and northeast before heading northwest. The airplane began to lose groundspeed, turned to the left and descended, then gained groundspeed as it continued to descend. The last data track showed the airplane at 650 ft and a groundspeed of 172 knots. A witness was outside at his house when the canopy from the airplane fell in his yard. The canopy was about 1.5 miles away from the main wreckage. The accident site was in a wooded area and the wreckage path was about 550 ft long. The airplane was heavily fragmented and scattered along a debris path. The canopy handle was found in the open position with the looking pin damaged and bent at its tip. It is likely that the canopy was not locked correctly before takeoff and that it opened in flight and departed the airplane. The airplane then made a gradual slow left descending turn and continued to gain airspeed until it contacted trees and the ground at a high rate of speed. Based on the available evidence, it could not be determined if the canopy contacted and incapacitated the pilot when it separated from the airplane, which then resulted in a loss of control.

Factual narrative

HISTORY OF FLIGHT On October 31, 2021, about 1320 eastern daylight time, an experimental, amateur-built Vans RV-4, N479JJ, was destroyed when it was involved in an accident near Chattahoochee, Florida. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot departed Tallahassee International Airport (TLH), Tallahassee, Florida, about 1303 destined for Monroe County Aeroplex Airport (MVC), Monroeville, Alabama. After departure, an air traffic controller terminated radar services and approved the pilot to change radio frequencies. About 17 minutes later, radar contact was lost. According to automatic dependent surveillance-broadcast (ADS-B) data obtained from the Federal Aviation Administration (FAA), the airplane climbed northbound to about 3,000 ft mean sea level (msl) after departure, then it turned right about 90° to the east, then back to the north. The airplane descended to about 2,500 ft and overflew Lake Jackson then headed westbound before turning northwest bound. The airplane’s altitude varied between about 2,000 and 2,500 ft. As the airplane flew about .70 nautical miles southwest of Mount Pleasant, it began to lose groundspeed and began turning left and descending, then gaining groundspeed while continuing to descend. Radar contact with the airplane was lost about 17 minutes after takeoff. The last data track showed the airplane at 650 ft and a groundspeed of 172 knots. An off-duty law enforcement officer was doing yardwork at his house when the airplane’s bubble-style canopy fell in his yard (the airplane was equipped with a buddle-style canopy that was hinged on the side). The canopy was about 1.5 miles away from the main wreckage. WRECKAGE AND IMPACT INFORMATION The accident site was in a wooded area and the wreckage path was about 550 ft long. The airplane was heavily fragmented and scattered along a debris path on a heading of about 220° magnetic. The outboard portion of the right wing, including the aileron, was separated and found in the vicinity of an initial tree strike. Small pieces of sheet metal, wheel pants, pieces of the carburetor, fuel tank wing sections and stringers were located along the wreckage path for about 400 ft. The empennage was leaning against a tree with impression marks about 15 ft up the tree. The inboard section of the left wing was found about 500 ft along the wreckage path. The fuel tank was breached, and the left wing was fire damaged. The engine, propeller, pieces of the landing gear, and parts of the instrument panel were located at the end of the wreckage path. Both propeller blades were impact separated. The canopy was impact damaged and the frame was bent in several areas. The canopy handle was found in the open position with the locking pin damaged and bent at its tip. The locking mechanism on the canopy could not be tested. MEDICAL AND PATHOLOGICAL INFORMATION Toxicology testing performed by the FAA’s ForensicServices Laboratory did not reveal any evidence of alcohol or other impairing drugs. An autopsy was performed on the pilot by the Office of the Office of the Medical Examiner, District Two, Tallahassee, Florida. The report listed the cause of death as blunt traumatic injuries.

Aircraft

Registration
N479JJ
Reported as
Vans RV4 (NO SERIES)
Category
Airplane, amateur-built
Serial number
79
Built
2001
Airframe hours
648
Engine
Lycoming O-320-E2A, 150 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · June 8, 2021
Departed
TLH · Tallahassee, FL
Destination
MVC · Monroeville, AL
Equipment
Unknown

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
79
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Toxicology
Performed
Flight hours
725 total

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 5 knots
Visibility
10 statute miles
Lowest ceiling
3,300 ft broken
Temperature
64 °F, dew point 50 °F
Altimeter
30.01 inHg
Observed at
TLH, 25 nm away
METAR
KTLH 311753Z 30005KT 10SM BKN033 18/10 A3001 RMK AO2 SLP162 T01830100 10189 20139 58011

Docket · 10

The files NTSB released with the investigation on October 5, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 12.6 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.