TANS Perú Flight 204 refers to a domestic scheduled Lima–Pucallpa–Iquitos passenger service, operated with a Boeing 737-200 Advanced, that crashed on 23 August 2005 on approach to Pucallpa Airport, 4 miles (6.4 km) off the airfield, following an emergency landing attempt because of bad weather, killing 40 of 98 passengers and crew aboard.