American Airlines flew a Boeing 737 Max with paying passengers from Miami to New York on Tuesday, the plane’s first commercial flight in U.S. skies since it was grounded after two deadly crashes. American flight 718 carried 87 passengers on the 172-seat plane, and the return flight from LaGuardia Airport to Miami International Airport held 151 passengers, according to an airline spokeswoman. Last month, the Federal Aviation Administration approved changes that Boeing made to an automated flight-control system implicated in crashes in Indonesia and Ethiopia that killed 346 people in all. In both crashes, the system pushed the nose down repeatedly based on faulty sensor readings, and pilots were unable to regain control. The FAA cleared the way for U.S. airlines to resume using the plane if certain changes are made and pilots are provided with additional training including time in a flight simulator. Brazil’s Gol airlines operated the first …