Safety Safety Concerns 737 Max 9 Crashes Boeing 737 Max 9 Inspections Incidents Grounding Safety issues Safety Inspection Inspection Safety Standards Maintenance Safety concerns Safety Improvements Anti-Ice System Emergency Landing Safety standards Boeing 737 Max 8 737 Max Disasters Design Features Quality Issues Door plug Safety Issues Investigation Fuselage Design Choices MCAS System Safety inspections Quality Inspections 737 Max Alaska Airlines plane Customer frustrations 737-9 Max Production-rate increases Production Safety Investigation Boeing 737 Max 7 Certification Manufacturing Error Defects Production Issues Quality Control Door Alaska Airlines Boeing 737 Max Affected planes Missing bolt issue Boeing 737 Max Program Safety Regulations Rudder Controls Dutch Roll Fuselage manufacturing Southwest Airlines Airline Safety Fatal Crashes Plane Crashes Flight Safety Safety Incidents Technical Issues Rudder Control System Tie Rods Safety Management Systems Engine Overheating Engine Inlets Accidents Engine Housing