Regulations & Safety
NTSB Reports Weather Balloon Collision with United Airlines Flight 1093
NTSB identifies a WindBorne Systems weather balloon as the object that struck United Airlines Flight 1093, ensuring a safe emergency landing.
NTSB Preliminary Report: United Airlines Flight 1093 Incident Analysis
On November 20, 2025, the National Transportation Safety Board (NTSB) released its preliminary report regarding a significant mid-air incident that occurred roughly one month prior. The investigation, filed under ID DCA26LA012, addresses the events of October 16, 2025, when a United Airlines Boeing 737-8 (MAX 8) collided with an unidentified object while cruising at high altitude. For weeks, industry observers and the public speculated on the nature of the object, with theories ranging from space debris to meteors. The release of this report provides the first official clarity on the matter.
The incident involved United Airlines Flight 1093, which was operating a scheduled domestic passenger flight from Denver International Airport (DEN) to Los Angeles International Airport (LAX). While flying over Utah, the aircraft suffered substantial damage to the flight deck windshield, forcing an emergency diversion. The release of the preliminary report marks a critical step in understanding how high-altitude airspace is managed and the potential risks posed by unmanned free balloons.
We have analyzed the NTSB’s findings to break down the sequence of events, the identification of the object involved, and the structural performance of the aircraft during the emergency. This report relies strictly on the factual data provided by the NTSB and the investigative research desk to offer a comprehensive overview of the event.
Sequence of Events and Flight Operations
On the morning of October 16, 2025, United Airlines Flight 1093 departed Denver with 134 passengers and 6 crew members on board. The flight proceeded normally during its initial climb and established a cruise altitude of approximately 36,000 feet (FL360). At this altitude, the aircraft was traveling at a groundspeed of roughly 395 knots. The skies near Moab, Utah, appeared clear, and operations were standard until approximately 06:44 MDT.
The Collision and Immediate Aftermath
According to the preliminary report, the situation changed instantly when the captain observed an object positioned immediately ahead of the aircraft. Due to the high closure rate typical of jet travel at cruising speeds, there was little time to react. Moments later, the object struck the first officer’s forward windshield. The force of the impact was significant enough to shatter the outer pane of the multilayered window structure.
The collision resulted in glass debris entering the cockpit environment. The captain sustained minor injuries, specifically cuts and bruises to his right arm, caused by the fragmented glass. Despite the breach of the outer pane, the aircraft’s pressurization system remained stable, a testament to the fail-safe design of modern aircraft windshields. Following the impact, the first officer assumed control of the aircraft, as the crew initiated emergency protocols.
The flight crew declared an emergency and executed the necessary checklists to ensure the safety of the passengers and the aircraft. They made the decision to divert to Salt Lake City International Airport (SLC). The descent and approach were conducted without further incident, and the aircraft landed safely on runway 16L. Following the landing, the plane was able to taxi to the gate under its own power, avoiding the need for a tow and allowing passengers to deplane safely.
“The object has been identified as a lost weather balloon operated by WindBorne Systems.”
Investigation Findings: Object Identification
The primary focus of the NTSB investigation was to positively identify the object that struck Flight 1093. Initial public speculation had suggested the possibility of space debris or a natural phenomenon, given the altitude of 36,000 feet. However, forensic analysis and flight tracking data have ruled out these theories. Investigators successfully traced the object to a Global Sounding Balloon operated by WindBorne Systems.
Trajectory and Tracking Data
The investigation revealed that the balloon in question had been launched the previous day from Spokane, Washington. WindBorne Systems, the operator, reported that they had lost communication with one of their balloons in the exact vicinity and timeframe of the collision. The last data transmission received from the balloon indicated it was at an altitude of 35,936 feet as it traversed Utah airspace.
The geometry of the collision highlights the challenges of detecting small, unmanned objects at high speeds. Flight data indicates that the United Airlines Boeing 737-8 was traveling southwest. Conversely, the balloon’s last reported track suggests it was drifting in a direction nearly opposite to the aircraft’s flight path. This head-on or near-head-on trajectory created a high-speed closure rate, intensifying the force of the impact upon collision.
WindBorne Systems describes their equipment as lightweight, unmanned free balloons. These devices typically consist of a thin-film envelope, avionics for data collection, and a low-density ballast system. While they are engineered to minimize impact forces, essentially designed to be fragile, the physics of a collision at jet cruise speeds can still result in significant kinetic energy transfer, as evidenced by the damage to the aircraft.
Structural Analysis and Safety Context
A critical component of the NTSB’s preliminary report focuses on the damage sustained by the Boeing 737-8 and the engineering standards that prevented a more catastrophic outcome. The windshield of a 737-8 is a complex, multilayered structure designed specifically to maintain cabin pressure and structural integrity even in the event that an outer pane fails.
Windshield Integrity and Certification
The aircraft’s windshield is certified to withstand significant impacts, including a four-pound bird strike. In this incident, the outer pane shattered, but the inner layers held, preventing rapid decompression. The damaged windshield has since been removed from the airframe and transported to the NTSB Materials Laboratory for a detailed microscopic examination. This analysis will help engineers understand the precise mechanics of the failure and verify that the materials performed as intended under the stress of the collision.
This incident has prompted a review of safety protocols regarding high-altitude balloon operations. While the investigation is ongoing, reports indicate that United Airlines and the Federal Aviation Administration (FAA) are reviewing the event to determine if operational changes are required. There are reports that immediate adjustments were made to minimize time spent at specific altitudes in affected areas, though these operational changes will likely be refined as the final report is completed.
Conclusion
The NTSB preliminary report on United Airlines Flight 1093 provides a factual resolution to the mystery of the October 16 incident. By identifying the object as a WindBorne Systems weather balloon, the investigation shifts focus from speculation to the practical management of shared airspace. The successful diversion and safe landing underscore the resilience of modern aircraft design and the professionalism of the flight crew under pressure.
As the investigation continues, the NTSB will analyze data from the cockpit voice recorder (CVR) and flight data recorder (FDR). A final report, which will include the probable cause and official safety recommendations, is expected to take between 12 and 24 months to complete. We will continue to monitor these developments as they provide vital insights for future aviation safety standards.
FAQ
Question: What object hit United Airlines Flight 1093?
Answer: The NTSB identified the object as a lost weather balloon operated by WindBorne Systems.
Question: Were there any injuries reported?
Answer: The captain sustained minor injuries, including cuts and bruises, from glass debris. No passengers or other crew members were injured.
Question: Did the cabin lose pressure during the incident?
Answer: No. Although the outer pane of the windshield shattered, the inner layers remained intact, and cabin pressurization remained stable throughout the diversion.
Sources
Photo Credit: NTSB
Regulations & Safety
Ubisoft Co-Founder Claude Guillemot Killed in France Plane Crash
Claude Guillemot, Ubisoft co-founder and EVP of Operations, died June 19 in a Cessna 421 crash near La Baule, France.
This is a developing story. Information may change as official details are released.
This article summarizes reporting by AP News by Angela Charlton, with additional corporate statements reported by Forbes.
Claude Guillemot, a co-founder of the global video game publisher Ubisoft Entertainment SA, and an unnamed flight instructor were killed on June 19, 2026, when their twin-engine Cessna 421 crashed during final approach to La Baule-Escoublac Airports in western France.
The 69-year-old executive served as Ubisoft’s Executive Vice President of Operations and Chairman of Guillemot Corporation SA. According to reporting by AP News, the aircraft was traveling from Rennes to La Baule for a weekend aviation gathering when it went down in a field near the airport and caught fire.
Flight and investigation details
The flight originated in Rennes on Friday evening. Local authorities confirmed two fatalities at the scene, identified as Guillemot and the flight instructor. Guillemot owned the Cessna 421 and was a licensed, experienced pilot. He was reportedly traveling to the Atlantic coast to participate in a private aviation event expected to draw over a hundred aircraft.
The Bureau d’Enquêtes et d’Analyses pour la Sécurité de l’Aviation Civile (BEA), alongside French judicial authorities, has initiated an investigation into the accident. The official cause of the crash has not been determined. Because both occupants were licensed pilots, investigators have not yet confirmed whether Guillemot or the instructor was at the controls at the time of the accident.
Ubisoft confirms executive death
Guillemot was one of five brothers who founded the video game publisher in 1986. The company has since grown into a major international developer, known for highly successful franchises including Assassin’s Creed. On June 20, 2026, Ubisoft released an official statement confirming the loss of its co-founder.
“Ubisoft was deeply saddened to learn of the death of Claude Guillemot, co-founder of the group and chairman of Guillemot Corp., in an accident. Our thoughts are with his family and loved ones during this difficult time. No further statements will be made at this time.”
AirPro News analysis
The loss of a founding executive and operational leader presents an immediate transition requirement for Ubisoft and Guillemot Corporation. While corporate succession plans have not been publicly detailed following the accident, the sudden departure of a key figure who has been with the company since its 1986 inception will require the board to stabilize operational oversight. We expect the BEA investigation to follow standard protocols for general aviation accidents, focusing on weather conditions, aircraft maintenance records, and pilot inputs during the critical final approach phase.
Sources: AP News
Photo Credit: AP News
Regulations & Safety
FAA and EASA Pledge Cooperation on Aviation Certification
FAA and EASA commit to harmonizing certification pathways and expanding safety data sharing for advanced aviation technologies.
The Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA) formally committed to deepening regulatory cooperation and harmonizing certification pathways for advanced aviation technologies on June 18, 2026.
Announced during the 2026 FAA and EASA International Safety Conference in Chantilly, Virginia, the joint pledge outlines a framework to streamline oversight and advance data-driven Safety Management Systems (SMS) across the global aerospace sector. According to a press release issued by the FAA, the agreement prioritizes collaboration at all organizational levels under the existing United States-European Union Aviation Safety Agreement.
Harmonizing certification and data sharing
The bilateral agreement focuses on several core objectives designed to keep pace with rapid technological advancements. Regulators plan to strengthen information exchange regarding safety oversight and expand the sharing of operational data to support future rulemaking. A primary goal of the pledge is to streamline approval processes for advanced aviation technologies, ensuring that certification pathways remain consistent between the two regulatory bodies.
FAA Administrator Bryan Bedford highlighted the necessity of the agreement during the conference.
“This is one of the most innovative moments in aviation, not just for America but also for our international partners. Sharing information and fostering conversations about safety allow us to strengthen our international partnerships and ensure aviation systems evolve safely and efficiently.”
EASA Executive Director Florian Guillermet echoed this sentiment, noting that strong cooperation between regulators is essential to maintain high safety standards as the industry evolves. Guillermet stated that aligning approaches will allow both agencies to support innovation while preserving public confidence in aviation.
Industry collaboration and future milestones
The joint pledge served as the culmination of the three-day conference, which operated under the theme “Safety Together: Innovation, Integration and Trust.” The event gathered approximately 400 senior aviation professionals, including representatives from manufacturers, airlines, industry associations, and regulatory bodies.
During the event, National Business Aviation Association (NBAA) President and CEO Ed Bolen participated in a fireside chat with Guillermet and FAA Deputy Administrator Chris Rocheleau. The discussion emphasized the requirement for continuous government and industry collaboration to manage the integration of new technologies.
To ensure the pledge translates into actionable policy, executive leadership from both the FAA and EASA committed to meeting regularly. These meetings will focus on reviewing progress, identifying emerging priorities, and sharing implementation updates. The agencies also confirmed that the next FAA-EASA International Aviation Safety Conference is scheduled for June 22 through June 24, 2027, and will be hosted in Cologne, Germany.
AirPro News analysis
We view this renewed commitment between the FAA and EASA as a critical prerequisite for the successful rollout of Advanced Air Mobility (AAM) and electric vertical takeoff and landing (eVTOL) aircraft. Historically, divergent certification standards between the United States and Europe have forced original equipment manufacturers (OEMs) to navigate costly and time-consuming parallel approval processes. By explicitly targeting the harmonization of certification pathways for advanced technologies, the two largest Western aviation regulators are signaling an intent to prevent regulatory fragmentation. The emphasis on expanding Safety Management Systems (SMS) also indicates a shift toward predictive, data-driven oversight rather than reactive rulemaking.
Sources: Federal Aviation Administration
Photo Credit: EASA
Regulations & Safety
AvSafety Joins Starr Safety Partnership for SMS Compliance
Aviation Safety Solutions joins Starr Safety Partnership, offering SMS consulting to insureds as FAA expands mandates to Part 135 and charter operators.
Aviation Safety Solutions, LLC (AvSafety) has been selected to join the Starr Safety Partnership, integrating its Safety Management System (SMS) consulting and training services into the network available to Starr Aviation clients.
Announced in a press release on June 17, 2026, the partnership provides Starr Aviation insureds with access to AvSafety’s specialized resources, including Federal Aviation Administration (FAA) SMS workshops, manual development, and safety audits. The integration comes as the FAA actively expands SMS regulatory requirements across broader segments of the aviation industry.
Expanding safety resources for operators
Starr Aviation, a division of Starr Insurance Companies, launched the Starr Safety Partnership in October 2022 to offer discounted safety services to its insured pilots and aircraft owners. By adding AvSafety to this network, Starr expands its portfolio of compliance and risk management tools available to policyholders.
Founded in 2013 and based in Janesville, Wisconsin, AvSafety focuses on helping aviation organizations build and maintain compliant safety programs. Amanda Ferraro, Chief Executive Officer of Aviation Safety Solutions, stated in the release that joining the network presents an exciting opportunity for the organization.
“Our team is passionate about helping organizations build sustainable safety programs that move beyond compliance and create lasting operational value. We are honored to support Starr clients as they strengthen their safety culture, improve risk management processes, and prepare for the evolving regulatory environment.”
Regulatory drivers for SMS adoption
The demand for specialized safety consulting is increasing due to shifting federal regulations. The FAA is currently expanding SMS mandates beyond Part 121 commercial airlines to include Part 135 commuter and charter operators, Part 91.147 air tour operators, and certain Part 21 aircraft manufacturers.
This regulatory expansion requires many operators to formalize their safety protocols, driving the need for external auditing, manual development, and structured training programs like those provided by AvSafety.
AirPro News analysis
We view the inclusion of AvSafety in the Starr Safety Partnership as a direct market response to the FAA’s widening SMS mandate. As smaller operators and charter companies face the administrative burden of implementing formal safety management systems, insurance providers are increasingly positioning themselves as facilitators of compliance. By subsidizing or discounting access to established SMS consultants, aviation insurers can simultaneously reduce their own underwriting risk and provide tangible value to policyholders navigating new regulatory hurdles.
Sources: Aviation Safety Solutions, LLC
Photo Credit: Aviation Safety Solutions
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