Expresso Aéreo Flight 028 (9D028/EPR028) was a domestic flight from Juanjuí to Lima, with scheduled stopovers at Tocache and Tingo María. On 25 February 1994, the Yakovlev Yak-40 with 31 occupants onboard, operating the flight, collided with Mount Carpish after taking off from Tingo María Airport, killing all 31 onboard. The investigation made by Peru’s Commission for the Investigation of Aviation Accidents was unable to conclude the cause of the incident due to the location of the wreckage. Aircraft. The aircraft involved was a Yak-40 with serial number 9640251. It was manufactured in 1976 and was operated under Aeroflot (identification number 88233). After the fall of the USSR, the airliner was transferred to the Russian airline of Cheremshanka. The aircraft was given to Expresso Aéreo on 17 February 1994 as OB-1559. Occupants. The crew consisted of three Peruvians and two Russians. The pilot and flight engineer were Russian. The first officer of the flight was the son of the airline’s CEO, Martín Perochena. Accident. The aircraft took off from Tingo María Airport and climbed to 13,000 feet. Six minutes later, the aircraft collided with the slope of Mount Carpish and exploded. The wreckage was located 45 kilometers southwest away from the airport and spread 660 feet. Air Force pilots found the aircraft, leading to 35 climbers discovering the wreckage of the aircraft on March 5th in an isolated area. Aftermath. The investigation by Peru’s Commission for the Investigation of Aviation Accidents was unable to conclude the cause of the incident due to the location of the wreckage. However, the crash is reported to have effectively ended commercial air links between Tingo María and Lima until LC Perú resumed the route in 2012.