REST, DUTIES & ICING TRAINING: INSIDE THE HUMAN FACTORS INVESTIGATION FOLLOWING THE DEADLY FLORIDA LEARJET CRASH

GREENACRES, FLORIDA — November 15, 2026

Federal investigators are examining a series of critical questions surrounding the final hours of a Learjet 60 flight that plunged from approximately 35,000 feet and crashed in South Florida, killing all nine people aboard.

More than two weeks after the November 1 disaster, the National Transportation Safety Board (NTSB) is continuing its investigation into the aircraft, its flight crew, the weather conditions and the sequence of events that led to the catastrophic descent.

At the center of the investigation are questions that extend beyond the aircraft’s mechanical condition: Were the pilots adequately prepared for the severe weather they encountered? Had they received sufficient rest before the flight? And did the combination of turbulence, ice accumulation and rapidly changing conditions leave the crew with too little time to recover control?

The flight was operated by Aurora Aviation, doing business as Upper Jets, and was traveling from Austin-Bergstrom International Airport in Texas to North Eleuthera Airport in the Bahamas.

The aircraft carried nine people, including Captain Jeff Gregory, 55, and co-pilot Nathalia Gadelha Filgueiras, 20. Neither the pilots nor the seven other occupants survived.

THE FINAL FLIGHT: A ROUTINE JOURNEY TURNS INTO A NIGHTMARE

The Learjet 60 departed Austin on the morning of November 1, heading toward the Bahamas.

Approximately two hours into the journey, the crew began encountering increasingly difficult weather conditions over Florida.

While cruising at approximately 35,000 feet, the pilots reported light, clear-air icing, moderate turbulence and precipitation to air traffic controllers.

The aircraft was reportedly being thrown up and down by approximately 700 feet, indicating the severity of the turbulence affecting the flight.

The crew requested permission to climb to 37,000 feet in an attempt to find more favorable conditions.

However, the situation deteriorated rapidly.

According to information presented by NTSB investigators, the aircraft subsequently entered a dramatic descent. The co-pilot communicated the seriousness of the emergency to air traffic control.

One of the most alarming transmissions included the words:

“We are in an overspeed condition descending 20,000 feet per minute!”

The aircraft continued losing altitude at an extraordinary rate before radar and radio contact were lost.

At approximately 12:50 p.m. local time, the Learjet crashed near Greenacres in Palm Beach County, Florida.

The impact produced a massive fire and scattered aircraft debris across nearby roads, buildings and residential properties.

All nine occupants aboard were killed. One person on the ground was also reported injured.

INVESTIGATORS TURN THEIR ATTENTION TO THE HUMAN FACTORS

While recovering the wreckage is essential to determining what happened, aviation investigations also examine the people operating the aircraft.

This is known as human-factors analysis.

Investigators may examine flight schedules, duty periods, rest opportunities, training records, previous flight experience and the crew’s ability to respond to unexpected emergencies.

In the Florida crash, these questions are particularly important because the pilots encountered several challenging conditions within a relatively short period.

A review of the crew’s activities before departure could help establish how much rest they had received, how long they had been on duty and whether fatigue could have affected their performance.

However, there is currently no public finding that either pilot was fatigued or inadequately rested.

Investigators must also establish whether the crew’s training and experience adequately prepared them for the specific icing and turbulence conditions encountered during the flight.

ICING AND TURBULENCE: TWO CRITICAL INVESTIGATIVE QUESTIONS

Aircraft icing is a serious aviation hazard because accumulated ice can alter the aerodynamic characteristics of an aircraft.

Depending on where ice forms and how much accumulates, it can increase drag, reduce lift and interfere with the aircraft’s ability to maintain stable flight.

Clear-air icing and icing associated with precipitation can present particularly difficult challenges because conditions may develop quickly at high altitude.

The Learjet crew’s reports of ice accumulation and moderate turbulence have therefore become major elements of the NTSB investigation.

Investigators are examining weather information, radar data, the aircraft’s recorded flight path and communications with air traffic control.

They will need to establish whether the aircraft encountered conditions beyond its operational capabilities, whether its anti-icing and de-icing systems were functioning correctly and whether the crew had sufficient time to respond.

Importantly, investigators have not established that icing alone caused the crash.

DID THE AIRCRAFT BEGIN BREAKING APART BEFORE IMPACT?

Another significant development has raised additional questions about the aircraft’s final moments.

Investigators identified evidence suggesting that portions of the Learjet may have separated while the aircraft was still airborne.

Recovered debris included components from the wings, engines, flight deck, vertical and horizontal stabilizers, elevator and other flight-control assemblies.

Some pieces were discovered considerable distances from the main impact location.

The recovery of separated tail components is particularly important because these structures help maintain stability and control during flight.

NTSB specialists are examining the recovered components in laboratories in Washington, D.C., including their physical condition and possible structural failure patterns.

Metallurgical examinations may help determine whether any components experienced structural failure before impact.

However, investigators have not yet established which parts separated first or what caused the apparent in-flight breakup.

A CRITICAL BREAKTHROUGH: COCKPIT VOICE RECORDER RECOVERED

On November 9, the NTSB announced that investigators had recovered the Learjet’s cockpit voice recorder (CVR) from the initial impact site.

The device was subsequently transported to the NTSB Vehicle Recorders Laboratory in Washington, D.C., for evaluation.

The recovery is a significant development because the recording could provide investigators with a clearer understanding of what happened inside the cockpit during the final minutes.

If the recording is usable, it may reveal conversations between the pilots, warnings from aircraft systems, emergency procedures and the crew’s reactions as the situation deteriorated.

Investigators will compare the recording with air traffic control communications, radar information and physical evidence recovered from the wreckage.

The cockpit voice recorder is particularly important in understanding the decisions made during the emergency, although it cannot independently establish the cause of the accident.

The NTSB has also completed its main on-scene investigative activities, with recovered aircraft components being transported for further examination.

THE 20-YEAR-OLD CO-PILOT WHO DREAMED OF FLYING

Among the nine victims was Nathalia Gadelha Filgueiras, a 20-year-old co-pilot whose death has devastated her family.

Her father, Allan Filgueiras, previously recalled how his daughter developed a passion for aviation at a young age.

She began flying with him when she was just 12 years old and obtained her own pilot’s license at 17.

By the time of her death, Nathalia had accumulated more than 1,300 flight hours and completed training to qualify for the Learjet aircraft.

Her father has publicly defended her professional abilities following online criticism about her age and experience.

He described her composure during the emergency communications as remarkable, emphasizing that she continued communicating with air traffic controllers as the aircraft descended.

The captain, Jeff Gregory, was believed to have been at the controls during the final moments, according to reporting on the investigation.

For Nathalia’s family, the loss has been especially devastating because aviation was not simply her profession. It was a passion she had shared with her father since childhood.

WHAT HAPPENS NEXT?

The investigation is far from over.

The NTSB must now bring together several different strands of evidence, including:

• Aircraft maintenance: Whether the Learjet’s engines, flight controls and anti-icing systems were operating properly.
• Weather conditions: How icing, precipitation and turbulence affected the aircraft at cruising altitude.
• Crew readiness: The pilots’ recent flight histories, duty schedules, rest periods and training records.
• Flight data and cockpit recordings: Whether the available recordings can establish the aircraft’s movements and the crew’s actions.
• Structural examination: Whether any aircraft components failed before the initial ground impact.

The NTSB has not announced a definitive cause of the crash.

Aviation investigations of this complexity can take many months, and investigators must establish the sequence of events through evidence rather than speculation.

For the families of the nine victims, every unanswered question represents another part of a tragedy they are still struggling to understand.

What began as a flight from Texas to the Bahamas ended in one of South Florida’s most devastating aviation disasters.

Now, investigators are working to determine whether the tragedy was the result of extreme weather, mechanical failure, human factors or a combination of circumstances — and what lessons can be learned to prevent another family from experiencing the same loss.