ATR (Aerei da Trasporto Regionale or Avions de transport régional) - a Franco-Italian aircraft manufacturer [Airbus (50%) Leonardo (50%)]
Turboprop Regional airliner
40~52 passengers (hence the "42" in its name)
ATR 42-500 (1994~present) - new PW127 engines, new six-bladed propellers, improved hot and high performance, increased weight capacity, and an improved passenger cabin.