'Why on earth is TransDigm (TDG) still flying under investors' radar?' is the biggest aerospace-related question in my head right now. 'Nobody' is ever talking about this stock on social media, in public or on investing websites. Meanwhile, the stock has not even been outperformed by Apple (AAPL). This includes the tech stock's latest >100% rally since the start of 2019. In this article, I am discussing the company's latest financial results and tell you why this stock is still not a sell but an incredible long-term investment. So, bear with me! Source: TransDigm (Picture: