Trans States Airlines (AX, St. Louis Lambert International (STL)) is to take delivery of six former Passaredo Linhas Aéreas (P3, Ribeirão Preto Leite Lopes (RAO)) ERJ-145s, the first two of which N834HK (c/n 145269) and N829HK (c/n 145281) are already in service as United Express operating feeder ...