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Boeing Knew of 737 MAX Software Flaw for Two Years Before Notifying Airlines

Guavy AI Editorial Team Published September 28, 2026

Instruments

Boeing has been aware of a software flaw in its 737 MAX aircraft since late 2024, but only notified airlines about it in August 2026. The glitch causes vertical navigation to switch unexpectedly after a missed approach, forcing pilots into manual or simplified modes.

Airlines such as United and Southwest have demanded older software versions due to this issue. Meanwhile, the FAA has paused certification of the MAX 10 pending review. Boeing claims that current training is sufficient for pilots, but it's developing both a fix and recovery procedure.

The FAA will convene a Corrective Action Review Board to evaluate the situation. If safety concerns emerge during evaluation, they will take action. Boeing aims to deliver a permanent fix by early 2028, but is accelerating efforts due to the situation.

Boeing Knew of 737 MAX Software Flaw for Two Years Before Notifying Airlines

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