Ryanair Holdings Plc said aircraft deliveries may be at risk of delay ahead of the coming summer travel season as Boeing Co. grapples with manufacturing issues after an accident on a 737 Max 9 earlier this month.

Michael O’Leary, chief executive officer of the Irish discount carrier, said he’s stepping up inspections at Boeing, though he’s unsure how the planemaker’s latest crisis will affect Ryanair deliveries. He said he’s concerned that the number of planes he receives by June will come in at the low end of the 45-50 Max jets he previously expected.