The flight instructor who trained a 20-year-old co-pilot killed in a devastating Learjet crash in Florida has paid an emotional tribute to his former student, as aviation experts question the decision to fly through dangerous weather conditions.
Nathalia Filgueiras was among nine people who died when a Learjet 60 crashed in Greenacres, Palm Beach County, on Sunday, November 1.
The aircraft had been travelling from Austin, Texas, to the Bahamas when its crew encountered deteriorating weather conditions before the jet entered a rapid descent.
Investigators are examining reports of icing, turbulence and a possible structural failure, although the official cause of the disaster has not yet been established.
Now, Filgueiras' former instructor has spoken publicly about her flying abilities and the remarkable impression she made during her training.
What did Nathalia Filgueiras' flight instructor say?
Chris Kirk, a flight instructor with approximately 40 years of teaching experience, shared an emotional tribute to Filgueiras on Facebook on Wednesday, November 4.
He described the young co-pilot as an exceptionally talented aviator who had demonstrated abilities far beyond what her age and flight hours might suggest.
"That young lady was born to fly!" Kirk wrote.
He went on to describe her as "without a doubt the most naturally gifted pilot I have ever taught" during his four decades as an instructor.
Kirk recalled that Filgueiras had fewer than 1,100 flight hours when she completed her Learjet type rating examination.
According to his account, she performed so impressively that the examiner believed she had accumulated approximately 5,000 hours of flying experience.
A type rating is an additional qualification that allows a pilot to operate a specific type of aircraft.
Kirk also remembered giving Filgueiras opportunities to fly different aircraft, including tailwheel planes and a Cessna Caravan.
He recalled one training session involving repeated spins that became so intense he began feeling unwell himself.
Beyond her technical abilities, Kirk emphasised her enthusiasm for aviation, explaining that she stood apart from students who pursued flying primarily as a career rather than a personal passion.
He concluded his tribute with a heartbreaking message: "I pray that she continues to fly amongst the clouds in heaven."
Why are aviation experts questioning whether the Learjet should have been flying?
The crash has prompted scrutiny of the aircraft's route through an area experiencing severe weather.
Aviation experts have questioned whether the crew should have attempted to continue towards their destination rather than diverting around the storm.
Justin Crabbe, a pilot and charter company executive, told the New York Post that the aircraft should have avoided the dangerous weather system.
He suggested that pressure to complete a journey, sometimes referred to in aviation as "get-there-itis", could potentially influence decisions made by flight crews.
However, there is no confirmed finding that this influenced the pilots involved in the crash.
Other specialists have highlighted the risks of ice accumulation on aircraft wings, particularly at high altitude.
Ice can interfere with airflow, reduce lift and increase drag, potentially making an aircraft more difficult to control.
Experts have also examined the crew's reported request to climb from 35,000 feet to 37,000 feet.
At higher altitudes, reduced air density can narrow an aircraft's operating margins, particularly when ice has affected its aerodynamic performance.
These observations remain expert theories rather than established explanations for the disaster.
What happened during the Learjet's final moments?
Recordings of communications with air traffic control have provided a disturbing account of the aircraft's final minutes.
The crew initially reported encountering moderate turbulence and ice accumulation while travelling towards the Bahamas.
They subsequently requested permission to climb to a higher altitude.
Shortly afterwards, the aircraft began descending at an alarming rate.
A crew member declared an emergency, reporting that the jet was losing altitude at approximately 10,000 feet per minute.
The situation deteriorated further as the aircraft entered an overspeed condition, meaning it was travelling beyond its permitted operating speed.
Further radio communications indicated that the jet was descending at approximately 20,000 feet per minute.
According to reporting on the recordings, the crew also described an extreme banking angle as they struggled with the situation.
The aircraft ultimately crashed into a road in Greenacres, creating a large crater and scattering debris across the surrounding area.
All nine people aboard were killed.
What has the NTSB discovered about the crash?
The National Transportation Safety Board has confirmed that investigators are examining evidence suggesting the Learjet began breaking apart before it struck the ground.
NTSB board member Tom Chapman said investigators had indications of an in-flight breakup during an early briefing.
Aircraft debris was discovered at locations some distance from the main impact site, raising questions about when different components separated from the jet.
However, investigators have not established whether structural damage caused the aircraft to lose control or occurred after the jet had already entered its fatal descent.
Weather conditions, the aircraft's performance and the decisions made during the flight are also being examined.
The NTSB investigation remains ongoing, and no definitive cause has been announced.
Was the 20-year-old co-pilot experienced enough to fly the Learjet?
Filgueiras' age has attracted considerable attention since the crash, with some social media users questioning whether someone so young should have been operating a business jet.
However, age alone does not determine whether a pilot is qualified to operate a particular aircraft.
In the United States, pilots can obtain a commercial pilot certificate from the age of 18, provided they meet the relevant training, experience and examination requirements.
Filgueiras earned her private pilot's licence while still attending high school and subsequently pursued commercial aviation.
Her family confirmed that she had been working as a commercial pilot for approximately nine months before the accident.
Kirk's tribute emphasised her strong performance during training and her ability to impress experienced examiners.
Although some commentators have questioned her experience, investigators have not established that her age or qualifications contributed to the crash.
Responsibility for the aircraft's operation and the circumstances of the accident remain matters for the official investigation.
Who else died in the Florida Learjet crash?
Among those killed were 55-year-old Captain Jeff Gregory and seven passengers travelling aboard the aircraft.
The passengers included technology entrepreneur Adam Robinson, 45, founder of Retention, and his wife, Helen Sharp, 40.
The couple's two young children, Emma and Charlie, also died in the disaster.
They were travelling with their nanny, Anita Maria Cetina, and two other passengers, Rachael Reed and Charmi Fehr.
The group had reportedly been travelling to celebrate Robinson's birthday.
In a joint statement, relatives remembered Robinson and Sharp as devoted parents whose children were central to their lives.
The deaths have prompted tributes to all nine victims as investigators continue working to understand what went wrong.
What happens next?
Federal investigators will continue examining the aircraft's wreckage, available flight data, weather information and communications with air traffic control.
The investigation will seek to establish the sequence of events that caused the aircraft to lose control and whether any mechanical, environmental or operational factors contributed.
Until those findings are published, suggestions that the aircraft should never have entered the storm remain expert assessments rather than an official determination of fault.
For those who knew Nathalia Filgueiras, the tragedy has also brought attention to a young pilot whose passion for aviation began long before her professional career.
Her instructor's tribute offers a reminder of the person behind the headlines and the future that was lost in the crash.
