American aircraft manufacturer Boeing faces increasing scrutiny following a series of mechanical failures and subsequent grounding of its Boeing 737 Max 9 model after an emergency exit door failed and caused an emergency landing last week. It was not immediately clear what caused the incident on Sunday and whether it was related to a manufacturing flaw.Boeing representatives did not provide a comment on Monday regarding the collision at O'Hare and instead directed The Associated Press to speak with the airlines involved and the FAA.Delta spokesperson Emma Johnson said Monday afternoon by...…American aircraft manufacturer Boeing faces increasing scrutiny following a series of mechanical failures and subsequent grounding of its Boeing 737 Max 9 model after an emergency exit door failed and caused an emergency landing last week. It was not immediately clear what caused the incident on Sunday and whether it was related to a manufacturing flaw.Boeing representatives did not provide a comment on Monday regarding the collision at O'Hare and instead directed The Associated Press to speak with the airlines involved and the FAA.Delta spokesperson Emma Johnson said Monday afternoon by...WW…