Just found this on "vesti" website.
http://www.vesti.ru/doc.html?id=2735707
Почему включился в режим пике стабилизатор — вопрос. Он приводится в действие кнопкой, которую пилоты называют "кнюпель".
The phrase itself, if translated to English, would suggest that the knyupel thing is responsible for re-posistioning of a horiz.stab ...
Direct translation is:
It is a question why the stabilizer was activated(started trimming, I presume) nose-down (пике literally means - negative pitch situation).
It (stab) is activated by a button that pilots call knyupel.
And I have to warn that this is a news organization and normally, when they post something about aviation or any other technical field, their wording in those articles usually sounds extremely weird and cumbersome.