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- United Airlines' CEO said he's building an alternative plan without the Boeing 737 Max 10.
- It follows certification delays to the jet and frustration after the Alaska Airlines blowout.
- Ryanair's CEO said Scott Kirby's comments "weren't helpful" and offered to take on its 737 orders.
Europe's biggest airline is defending Boeing as the American manufacturer deals with the fallout from the Alaska Airlines blowout.
During Ryanair's earnings presentation on Monday, CEO Michael O'Leary said: "I want today to extend, on behalf of Ryanair, my support to Dave Calhoun and Brian West, the CEO and CFO of Boeing."