By David Shepardson WASHINGTON (Reuters) -A U.S. National Transportation Safety Board investigation found ineffective actions by Boeing and ineffective oversight by the Federal Aviation Administration that led to a mid-air cabin panel blowout of a new 737 MAX 9 flight in January 2024 that spun the planemaker into a major crisis,

US safety investigators pointed to breakdowns in Boeing Co.’s manufacturing processes as well as poor oversight by the US Federal Aviation Administration as key factors that led to a panel blowing off a 737 Max aircraft shortly after takeoff last year.

The U.S. National Transportation Safety Board will hold a hearing on Tuesday to determine the probable cause of a mid-air cabin panel blowout of a new Boeing 737 MAX 9 flight in January 2024 that spun the planemaker into a major crisis.