My comments are based on several decades experience as an aircraft mechanic...but we do have a poster here, whom I've blocked, who claims such experience, and doesn't have it. He lasted bout ten years before he quit, and has appointed himself the missionary of pessimism on aviation maintenance. I blocked him because his information is routinely so wildly inaccurate as to constitute a lie (much like his claim of experience). It doesn't reflect the reality of working in aviation maintenance. Not in the slightest.