Fixing these engines to the 737’s wings put Boeing’s engineers up against some unique and challenging problems caused by the age of the jet’s basic design, originating in the mid-1960s. The
The Boeing 737 MAX has stabilizer cutout switches marked as PRI (left) and B/U (right). With the MAX, Boeing added MCAS to the existing STS functionality. If Boeing kept the cutoff switches functionality intact, then turning off the right switch would disable both STS and MCAS, keeping the electric trim operable.
This included concealing the very existence of the MCAS system from 737 Max pilots and failing to disclose that a warning signal to alert pilots of problems with critical sensors was inoperable on
On March 11, before the grounding of the 737 MAX, Boeing outlined “a flight control software enhancement for the 737 MAX,” that it’s been developing since soon after the Lion Air crash.

Half of Boeing's sales come from the 737 Max. According to Boeing and the FAA, the problem first became apparent during testing of a newly manufactured 737 Max 8, which had yet to be delivered to

Boeing's 737 MAX, the jetliner grounded for 20 months after two international crashes that killed 346 passengers and crew, resumed commercial flights Dec. 29. The aircraft was cleared to fly by
The report cites an internal Boeing survey conducted in 2016 at the height of the 737 MAX’s certification activities, which “found that 39% of Boeing employees that responded perceived
Chat transcripts between Boeing 737 MAX test pilots appear to indicate that problems with the aircraft’s suspect automated safety systems were identified years before back-to-back air disasters resulted in the plane being grounded indefinitely. Company officials say that the documents have been widely misinterpreted and were promptly turned over to investigators. Late last week, Boeing […]
4 days ago · The problems with the MCAS in the Boeing 737 MAX 8 can be attributed to a combination of factors. One of the crucial issues was related to the aircraft’s new engine placement, which altered its aerodynamic characteristics. To maintain similar flying characteristics as prior 737 models, MCAS was implemented to automatically adjust the aircraft
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    • boeing 737 max 8 mcas problems