The Boeing 737 MAX has faced
major safety, software, and manufacturing problems, led by deadly crashes and ongoing regulatory delays.
The Fatal Crashes and MCAS
- The root design change: Boeing used larger, more efficient engines placed higher and further forward on the wings. This changed how the plane handled and caused the nose to pitch upward during certain high-power climbs.
- The MCAS flaw: To fix this tendency without requiring expensive pilot retraining, Boeing added an automated software system called the Maneuvering Characteristics Augmentation System (MCAS).
- The failures: MCAS pushed the aircraft's nose down based on faulty data from a single angle-of-attack sensor. This caused two fatal crashes—Lion Air Flight 610 and Ethiopian Airlines Flight 302
—which killed 346 people and resulted in a worldwide grounding of the jet for nearly two years.
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Recent Software and Structural Issues:
- Latest software glitch: The Federal Aviation Administration (FAA) delayed the certification of the 737 MAX 10 due to a newly discovered software bug. This glitch can cause pilots to lose automated vertical landing guidance during a missed approach (go-around), forcing them to use manual or secondary pitch control.
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- Fuselage and door plug incidents: In early 2024, an Alaska Airlines MAX 9 suffered an uncontrolled decompression after an exit door plug blew out mid-flight, sparking criminal investigations and intense scrutiny over factory quality control.
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- Inspection orders: The FAA ordered mandatory inspections of hundreds of 737 MAX planes to check for structural cracks near forward service doors.
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