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Old 9th Nov 2018, 17:53
  #909 (permalink)  
alph2z
 
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Originally Posted by bsieker
... What worries me a bit more is the sentence

I'm not that closely familiar with 737MAX systems, but how can the trim still run away if the switches have been set to "CUTOUT"? Aren't they mechanical circuit breakers?

Bernd
On the cockpit panel probably these are not circuit breakers but rather switches. The switches on the CUTOUT control panel send a signal to the Trim computer in the electronics bay and then to HS horizontal stabilizer electronics and motors. Any hardware and software failures between the CUTOFF switch and the HS may cause the problem. They probably don't have all the facts yet and are very cautious. The HS TRIM circuit breaker is probably hard to find and pull during an emergency.

But, them having to hold the trim wheel is scary; especially during an emergency where the problem is not fully known !

Last edited by alph2z; 9th Nov 2018 at 18:13. Reason: clarification
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