NTSB Releases Preliminary Report on United Airlines Flight UA1093 Mid-Air Collision

Photos used in this article are sourced from AirLive.net

The U.S. National Transportation Safety Board (NTSB) has released its preliminary findings on the unusual mid-air collision involving United Airlines flight UA1093, a Boeing 737-8 (registration N17327), which took place on October 16, 2025, near Moab, Utah.

According to the NTSB, newly analyzed data confirms that the aircraft struck a high-altitude weather balloon operated by WindBorne Systems while cruising at FL360. The balloon—classified as a lightweight unmanned free balloon under CFR Part 101—stopped transmitting moments before the event. Investigators say it was drifting at approximately 35,900 ft on a near-reciprocal track with the 737 when the collision occurred.

Impact and Immediate Aftermath

The strike shattered the first officer’s forward windshield and caused minor lacerations to the captain. Despite the damage, the aircraft’s pressurization remained stable, and the crew maintained complete control. Flight UA1093 diverted to Salt Lake City, where it landed safely. The captain received medical treatment upon arrival for injuries sustained during the impact.

WindBorne Systems stated that the balloon was built from low-mass materials specifically intended to reduce collision hazards. However, the NTSB emphasized that the event highlights the risks associated with high-altitude uncrewed objects—especially when communication or tracking links fail.

Ongoing Investigation

The damaged windshield has been transported to the NTSB Materials Laboratory for further examination. Specialists from the FAA, Boeing, United Airlines, and WindBorne Systems have joined the investigation to support the technical analysis.

A final report, including conclusions and safety recommendations, will be issued upon completion of the investigation.