So it fails the first flight test by more than the number of trim wheel turns allowed. Engineering then makes an adjustment in the wrong direction making the situation worse.
You can then fly around for ten days with this unknown quantity on revenue.
Dear Lord please ensure I am not a passenger on this aircraft!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Out of interest I saw 737-300 come off C check during the winter (short days) which failed the initial check. The engineers adjusted the wrong way and the first days airtest daylight was lost. As they were then unsure of the position they then rigged from scratch.
It failed again and a second adjustment was made. It failed again (just) and the second days flying was over. Passed at the 5th time of asking.
Two and a half days late off C check and the operator not happy, but the aircraft was safe.