29 September 2011 An Indonesian Aerospace CASA C-212, registration PK-TLF, built in 1989, carrying 18 people (14 passengers, three crew and the pilot) on a flight between Medan, North Sumatra and Kutacane, Aceh operated by Nusantara Buana Air crashed into Gunung Kapur, a 1600 meters mountain in the Bukit Barisan mountain range, a 10 km walk from the village of Bukit Lawang in Bohorok district Gunung Leuser National Park.