Ryanair Blade Failure Puts Spotlight on Delayed Engine Fix Across Europe's 737 Fleet

Investigators have traced last month's dramatic in-flight window loss on a Ryanair Group jet to a fatigue-cracked engine fan blade, in a finding that revives uncomfortable echoes of a fatal 2018 accident and raises questions over why a mandated safety fix will not be compulsory across Europe's most common airliner until 2028.

The US National Transportation Safety Board, to which Greece handed the inquiry under international rules, said in a preliminary report that blade number 10 in the right-hand CFM International CFM56 engine fractured near its root and separated as the Boeing 737-800 climbed out of Thessaloniki on 10 July. Debris punched a radial hole in the engine inlet cowl, struck the fuselage and shattered a cabin window beside row 11, partially pulling a 61-year-old passenger through the opening before others hauled him back. The crew descended, burned off fuel and returned to Thessaloniki, where the aircraft, operated by Malta Air on Ryanair's behalf, landed without further injury.

The metallurgy is the crux. About 37 per cent of the fracture surface showed features consistent with high-amplitude fatigue, the report found, yet the blades had passed ultrasonic inspections in November 2025 and again in May 2026, just 253 flight cycles before the failure, with no defect detected. Investigators also recovered bird remains from several points in the engine, and the powerplant had been linked to four suspected bird strikes over the previous year, though the board has not established whether ingestion caused the crack and the inquiry remains open. Feather samples have gone to the Smithsonian for identification.

The regulatory backdrop is the sharper concern for operators. The failure closely mirrors the 2018 Southwest Airlines accident that killed a passenger and prompted an FAA airworthiness directive requiring modifications to the CFM56 fan and cowl. The Ryanair aircraft had not yet undergone those changes, which do not become mandatory until 31 July 2028, and damage on the jet fell within areas covered by existing directives. With the CFM56-powered 737-800 forming the backbone of budget fleets across Europe, the finding is likely to intensify pressure on carriers and regulators to accelerate compliance rather than run the timetable to its deadline.

Ryanair chief executive Michael O'Leary, who had earlier attributed the event to foreign-object damage, was rebuked by the NTSB for making public statements it said breached international investigation protocols. The airline retains one of the industry's strongest safety records, with no passenger fatalities in four decades of operation, but the episode lands at a delicate moment for a sector already contending with the grounding of Pratt & Whitney engines and the wider strain of the summer's fuel shock.