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— The views of pilots and instructors on the potential risks of trainees spending more time learning automated systems than manual control.

— A visual explanation of why investigators fear two Boeing 737 Max aircraft may have crashed for similar reasons.

— The United States decision to ground Boeing’s 737 Max aircraft on Wednesday.

Passengers in the United States were bracing for delays on Thursday, a day after President Trump announced the grounding of all Boeing 737 Max aircraft in the wake of a deadly crash in Ethiopia, but experts said the three American carriers that operate the planes would replace the jets with other aircraft.

• The so-called black boxes, voice and flight data recorders, recovered from the wreckage of Flight 302 were sent to France for analysis on Thursday, Ethiopian Airlines said. Satellite data has revealed similarities between Sunday’s crash and the October crash of a plane flown by the Indonesian carrier Lion Air, but the recorders contain more detailed information about the Ethiopian flight’s final moments.

• New disclosures point to what appears to have been a struggle by pilots of Ethiopian Airlines Flight 302 to control their new Max 8 aircraft minutes after takeoff.

Delays are inevitable, and some customers will be inconvenienced, as airlines reshuffle their plans in the wake of a presidential order grounding about 70 Boeing Max aircraft across the United States.

The planes operated by Southwest, American and United airlines carry about 300,000 passengers per week, said Scott Mayerowitz, the executive editorial director of The Points Guy, a travel website. Airlines could cancel some of those flights and rebook passengers on similar trips, or briefly delay routine maintenance on some of the few planes they have in standby, he said.

The airlines may reassign planes originally designated for different routes. For example, an airline could cancel one of its frequent Chicago-to-New York flights, which typically are not sold out, rebook those passengers and reassign a plane.

That could result in delays and cancellations not just on routes that fly 737 Max jets, but those that use different planes that have been redirected to routes formerly flown by a Max jet.

No matter the fix, the swap could mean a different seating arrangement. Mr. Mayerowitz said passengers planning to fly in the next few weeks should check their airline’s website to make sure their seat assignments have not changed after switching aircraft.

“Passengers who were booked in an aisle seat or extra leg room might now find themselves in the back of a jet, stuck in a middle seat,” he said.

Ethiopia sent the “black boxes” recovered from the wreckage of Flight 302 to Paris on Thursday, Ethiopian Airlines said on Twitter, as investigators hope to conduct a more detailed analysis of the flight data and cockpit voice recorders.