The Helicopter that operates on mountainous region of Nepal Himalayas, is Euro copter AS 350 Squirrel. Including Ecureuil helicopters are certified to fly above 2,300 feet / 7,010 m high. AS Euro copter AS 350 and Ecureuil models are most efficient and reliable for mountainous region like in Nepal Himalayas. The helicopter normally accommodates a maximum number of 5 adult passengers only. Subjective to high altitude and temperature on the landing site.