PA28 AI Question
We've got problems with the AI (Attitude Indicator or Artificial Horizon) on our PA28 Warrior II. We're told that to replace it is almost impossible because the 'hole in the panel is too big for AIs that can be obtained now'.
Not being an engineer, I'm puzzled as to why fitting a new AI into a PA28, one of the most popular (some might say 'common') aircraft around is such a problem.
Can anyone offer an explanation or information?