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Old 15th Nov 2018, 11:01
  #1265 (permalink)  
Join Date: Nov 1998
Location: killington Vt
Posts: 380
Originally Posted by tdracer View Post
There are several failures that can cause a stab trim runaway - and not all are solved by turning the system 'OFF". In addition to welded switch contacts, the motor can fail in such a way that you can't turn it off. These failures are rare, but not impossible - the only way to 100% disable the system is to pull the circuit breaker(s) (and that's not something they like to tell the pilots to do).
Although in the past they did pull c/bís .
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