PPRuNe Forums - View Single Post - MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures
Old 2nd Jul 2019, 18:52
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BDAttitude
 
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Originally Posted by yoko1
to the collective body of professional accident investigators, multiple certificate authorities representing dozens of nations, subject matter experts, and other interested parties such as the aerospace-centric media (i.e. Aviation Week and the like) and the massive army of tort lawyers lining up to sue Boeing.
....
Time to move on.




Oooh au contraire.

To the collective body of professional accident investigators, multiple certificate authorities representing dozens of nations, subject matter experts, and other interested parties such as the aerospace-centric media (i.e. Aviation Week and the like) and the massive army of tort lawyers lining up to sue Boeing:

Now as we know, that a fast speed trim runaway that cannot be stopped by counter trimming is considered a hazardous condition.
And now as we now that this Eaton actuator is a fancy modern microprocessor commutated and speed controlled brushless motor.
Could you please have a look if the actuators electronics - which is hardware and software - have been designed to a suitable design assurance level. Which would be DAL-B? DAL-A?
Uncontrolled dive is just a bit-flip away.

Thank you!
(Not suggesting any link to the two accidents though)

Last edited by BDAttitude; 2nd Jul 2019 at 19:09.
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