Ryanair CEO Michael O’Leary said on Monday that an initial finding from a probe into an incident in which a passenger was partly sucked out of a Boeing 737’s broken window suggested “foreign object damage” and was not due to the aircraft’s age or servicing conditions.

The US National ⁠Transportation Safety Board is ⁠investigating the July 10 incident, in which a piece of engine broke off the aircraft and smashed the ​window shortly after takeoff from Thessaloniki ⁠in Greece, according to video and the Federal Aviation Administration. The plane, headed to Germany, ⁠lost pressure and made ‌an emergency ⁠landing.

“Initial indication would suggest it looks like a foreign object damage to the engine on takeoff at ​Thessaloniki, but we don’t have, we can’t say that definitively,” ‌O’Leary told analysts after Ryanair’s results for the April-June quarter.

O’Leary said the aircraft was 18 years old and its engine had been fully ​serviced and overhauled within the last two years. He added that a draft report on the incident would be issued in about ‌28 ​days, followed by a more detailed report.

The event, which had echoes of two Southwest Airlines Boeing ⁠737 NG flights in 2016 ‌and 2018, prompted a re-evaluation of the response to ​those incidents, FAA Administrator Bryan Bedford told Reuters last week.