Broken Fan Blade, Shattered Window: What the NTSB Found in the Ryanair Engine Failure

A preliminary report by the US National Transportation Safety Board (NTSB) has determined that an engine fan blade broke apart shortly after takeoff on a Ryanair flight from Greece to Germany in July 2026, sending broken engine parts through a cabin window and causing a passenger to be partly pulled out of the aircraft mid-flight. The Guardian

The incident occurred on 10 July 2026 aboard flight FR1879, a Boeing 737-800 operated by Ryanair's subsidiary Malta Air. The aircraft, carrying 149 passengers and four flight attendants, was on a scheduled route from Thessaloniki, Greece to Memmingen, near Munich, Germany. Greek authorities delegated the investigation in full to the NTSB a few days after the event. The NTSB assigned the case identifier DCA26FA274 and titled its inquiry "Ryanair Uncontained Engine Failure followed by Cabin Depressurization and Passenger Window Injury." NTSB

According to the NTSB's preliminary findings, the flight experienced a No. 2 (right) engine fan-blade-out (FBO) failure during climb out from Thessaloniki International Airport (SKG). An FBO is when a fan blade in the engine breaks off during operation, which can cause serious damage as the loose blade and resulting debris strike other engine components. Examination of the engine and nacelle (the outer housing around the engine) revealed that fan blade No. 10 had fractured and separated below the blade platform. The flight crew had experienced a high vibration engine alert during the climb, reduced engine power in response, and carried out a series of checks. Engine vibration then reduced, and the crew continued the climb on autopilot before vibrations increased significantly and the crew heard a loud bang. NTSB

The cabin depressurised following the structural breach. Depressurisation means the pressurised air inside the cabin, which keeps the cabin breathable at high altitude, rapidly escapes through the opening. The two pilots put on their oxygen masks, declared an emergency, and began an immediate descent. They decided to return to Thessaloniki airport, where they made an uneventful landing. Flight attendants reported hearing and feeling a loud continuous vibration and seeing a small amount of fog or smoke before the oxygen masks deployed.

Serbian entrepreneur Ljubisa Karović, aged 61, was seated by the window in seat 11F. The impact of the broken engine parts shattered the window, and Karović's head and right arm were sucked out of the opening. Other passengers grabbed hold of him, preventing him from being completely pulled out of the aircraft. Karović's wife, Svetlana, later told him he had fainted several times, including after being pulled back inside the cabin. Speaking less than a fortnight after the incident, Karović told the Guardian he was lucky to be alive. He recalled not remembering much of the event but suffering from a painful head and neck. The Guardian

The investigation has also surfaced details about the aircraft's recent operational history. Four bird strikes to the plane's right engine were reported by flight crews in the twelve months preceding the incident, with bird remains reportedly found in two of those cases. Reuters separately reported that bird remains were found aboard the 737 engine involved in the July 2026 Ryanair Greek incident under NTSB investigation. Additionally, the fan blades had undergone ultrasonic inspections in recent months, with no findings noted at the time. Ultrasonic inspections use sound waves to detect hidden cracks or flaws inside metal parts that are not visible to the naked eye. Reuters

The broader context here involves the complex interplay of prior foreign object damage, the limits of non-destructive testing, and the cascading effects of an uncontained engine failure. An uncontained failure means that broken engine parts punch through the engine casing rather than being held inside it, and engine containment casings are specifically designed to prevent this, though they cannot always fully stop high-energy debris. The NTSB's documentation of four prior bird strikes on the same engine, combined with the finding of bird remains aboard the engine after this event, raises questions about whether repeated wildlife impacts gradually weakened the blade over time. Ultrasonic inspections are designed to detect subsurface flaws, yet the fan blade in question fractured below the platform with no prior findings. This suggests a failure mode that either developed between inspection cycles or was not detectable through the methods used. The depressurisation and window breach sequence also points to the vulnerability of cabin structures to high-energy debris from an uncontained engine failure.

The NTSB is an independent federal agency charged by Congress with investigating every civil aviation accident in the United States and significant events in railroad, transit, highway, marine, pipeline, and commercial space transportation. The agency determines probable causes and issues safety recommendations aimed at preventing future occurrences. In this case, the preliminary report establishes the factual baseline; the probable cause determination and any corresponding safety recommendations will follow as the investigation matures. For now, the focus will likely center on metallurgical analysis of the fractured blade, the relationship between prior bird strike damage and the eventual failure point, and whether existing inspection intervals and techniques are sufficient for engines with comparable operational histories. NTSB