A preliminary report into a fatal air ambulance crash says the aircraft had lost its ability to navigate using GPS shortly before it hit the ground. Multiple Australian outlets report that the incident occurred on a night when the US military was testing GPS jamming, raising questions about the circumstances that affected navigation systems. The accounts describe the GPS outage or loss of navigational capability as occurring moments before the crash, based on early findings contained in the preliminary report. The articles do not provide additional technical details in the excerpts supplied, and they do not confirm whether the jamming test was directly responsible for the aircraft’s loss of GPS navigation. Overall, the reporting indicates an investigation is underway, with investigators examining the timing of the US military’s activities and the aircraft’s navigation status in the moments leading up to the crash. The story remains subject to further review as authorities release more information.