Just wanted to know cause I got it wrong on a test. The question "they" had was: When is a compass swing due? After engine change, airframe repair, 12 months, or all the above. Their answer was all of the above. I didn't argue but i asked others later and the response was "what type aircraft?" For a UH-1 yes but others it all depends on the manual, situation, etc.
The questions are written by my employer, and the tests are not very well concieved. It is a brief window into their limited views(we do multiple platforms). My days there are numbered. With the current state of aviation maintenance in the US it might be awhile.