Boeing's 737 Max 9 jets are grounded in the US as airlines await inspection instructions following a fuselage incident. The FAA and Boeing are in talks to provide detailed guidance for safety inspections. The incident has prompted concerns and led to the grounding of Max 9 planes by airlines. The National Transportation Safety Board is investigating the cause, and the FAA has ordered inspections for 171 Max 9 planes. This has resulted in numerous flight cancellations and disruptions for passengers. The incident has raised questions about Boeing's safety and manufacturing processes.