To use the Aero search feature, type in a keyword or set of keywords (separated by spaces) into the text box and click on the Search Aero button. The query will retrieve from the Aero web site a list of articles that contain your keywords. This list is sorted by relevance. That is to say, if you search for the word "empennage," the resulting report will first list articles that contain the greatest number of references to "empennage."