With over 412,000 members, the Aircraft Owners and Pilots Association (AOPA) continues to work for the issues that are important to its members. One area that they are very concerned with is providing educational materials and opportunities for those persons who would like to enter the aircraft maintenance field. They are continuingly updating their online collection of technical primers and general overviews. One particular noteworthy publication is their "Propeller Safety" manual. Within the document's 12 pages, visitors can learn the basics about working around the propeller, prop mechanics, and key maintenance matters. Along the way, interested parties will find helpful graphics, photographs, and visual aids that will help them identify various problem areas.