The critical flaw lay in its dependence on a single angle-of-attack (AOA) sensor, creating a dangerous vulnerability where a faulty or misaligned sensor could feed incorrect data, triggering an uncommanded nose-down input that was difficult for pilots to override. The pressure to deliver on cost and schedule, combined with a regulatory culture that increasingly deferred to manufacturer safety analyses, created an environment where these latent risks were not sufficiently challenged or mitigated.
Boeing 737 Max Crash Investigation Findings: Key Technical and Regulatory Factors
This led to decisions that masked the novel MCAS system from pilots; it was not prominently featured in the flight manual as a system that could repeatedly command stabilizer trim against pilot input. The checklists provided were ambiguous and did not directly address the runaway trim scenario caused by MCAS.
Checklist Ambiguity Procedures did not clearly guide pilots to diagnose and counteract the runaway trim. Factor Contribution to Crashes Single AOA Sensor Provided false data to MCAS, triggering uncommanded nose-down input.
Boeing 737 Max Crash Investigation Findings: Key Factors and Safety Oversight
Following the tragic crashes of Lion Air Flight 610 and Ethiopian Airlines Flight 302, the aviation world has been scrutinizing the intricate interplay between technology, automation, and human factors that culminated in the Boeing 737 MAX disaster. Furthermore, the system was certified under an assumption that a single-point failure would be addressed by pilot training and procedures, a calculation that failed to account for the simultaneous failure of a primary instrument and the physical limitations a pilot faces during an unexpected high-speed dive.
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