Welcome to the forum!
If you go to the site FAQ via the link at the top, you will find the answers to most of the basic questions, including how to post attachments.
Also the Search functions (menu link at top right) work fairly well, and will enable you to find existing threads which may further answer your questions.
Lastly here is a general overview of the Repair sub-forums which should contain existing threads which cover your concerns.
http://www.airforums.com/forums/f3/