During online booking, travelers can see the model of the aircraft assigned to their flight when they select their seat. Several websites dedicated to frequent travelers also provide this information, including FlightStats.com and SeatGuru.com. Beware of canceling a ticket because you don’t want to fly on the Max 8. The airline probably won’t refund your money or let you rebook without a penalty.

Is the new technology associated with the Lion Air crash new to only the Max 8 series of aircraft? If it is found that the same technology also had a role in the Ethiopian Airlines crash, what sort of repercussions would Boeing be subject to?

— Marcus Bierbaum, Cleveland

The technology that is under scrutiny is the maneuvering characteristics augmentation system, or MCAS. It is part of the flight control software on both the Max 8 and the Max 9. If information from the Ethiopian Airlines crash suggests the software might have been a factor in the disaster, the consequences for Boeing could be severe. It has already begun a costly and complex redesign of the flight control software. It has been sued by families of the victims and suffered a blow to its reputation.

Boeing’s customers have also suffered consequences, as the majority of airlines that fly the Max 8 have grounded their planes or have been told to by their government’s regulators. Additionally, on Tuesday, the European Union and other countries around the world banned Max models from flying in their airspace.

What training is required for 737 pilots to transition to flying the 737 Max 8? Have the requirements changed?

— Don Griffin, Houston