Two U.S. airlines have said they may abandon plans to buy more Boeing 737 MAX planes, a flashing red warning light for the aviation giant as it tries to quell its latest safety crisis.

The CEOs of United Airlines and Alaska Airlines both said Tuesday that they can’t necessarily count on the plane-maker for future orders, less than three weeks after a door panel blew off mid-air during an Alaska flight over Portland, Oregon.

Neither airline is canceling any orders yet, though United said it’s mulling removing another 737 model — the larger MAX 10 — from its fleet plans.

And Alaska Airlines CEO Ben Minicucci is set to say in an NBC News interview being aired Tuesday night that he is “angry” with Boeing and has had “very tough, candid conversations” with the company’s leadership.

The Jan. 5 door blowout “happened to Alaska Airlines. It happened to our guests and happened to........

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