Board Thread:Game Updates/@comment-1820055-20150808000124/@comment-26486243-20150810211959

I should clarify that at the time when the patch notes were released, aircraft did not have any 'bars' whatsoever. The dev post did not mean that if your squadron appears to have 2 bars when you logged in, that it cannot go below 2 bars - but rather that it cannot go below zero, because zero bars was the default value of the aircraft.

Aircraft can either be equal to the power they had before the update or above it in some way, there is no way for the aircraft to be rekt so bad they become weaker than they were before the patch.