Dozens of pilots reported near-misses and other problems on the Newark Liberty International Airport approach where United Flight 169 smashed into a truck this weekend. Years of confidential reports submitted to the Federal Aviation Administration detail problems with “Stadium Visual Rwy 29” — a notoriously difficult and dangerous landing route, know for its irregularities and potential hazards. That approach is infamous for a sharp, 70-degree turn, an unusually short runway, nonstandard guidance lights, and other…