Over the past few years, I have had a website (www.FAATestCodeLookup.com) running that helps people look up the knowledge test codes that are generated on FAA knowledge tests. This past week, I finally looked at the report data in searches people have been doing on the site.

My data set on this one is smaller, just 170 reports, but in those, I found the following were the top 10 knowledge test codes that show up on mechanic tests.

The next chart shows exactly what percentage of the test reports those particular codes show up on as a “missed question” subject area, and the specific ACS code description associated with those codes.

If you are taking an Unmanned Aircraft test anytime soon, these subject areas might just be worth a little more study time if you want to increase your test scores compared to everyone else!

Data source for these data points compiled from data collected on: