2012 Mount Salak Sukhoi Superjet crash

On 9 May 2012, a Sukhoi Superjet 100 airliner on a demonstration tour in Indonesia crashed into Mount Salak, in the province of West Java, The crashed aircraft, a Sukhoi Superjet 100 belonging to the Russian aircraft manufacturer Sukhoi Corporation, had taken off from Halim Perdanakusuma Airport for a demonstration flight in Indonesia to potential customers in that country.
Investigation.
The subsequent investigation concluded that the flight crew, led by pilot Alexander Yablontsev, was unaware of the presence of high ground in the area and ignored signals indicating danger from the terrain warning system, incorrectly attributing them to a system malfunction. Also, his view was obstructed due to thick cloud cover. 
In addition, it was found that in the minutes prior to the accident, the crew, including the captain, were chatting with potential customers present in the cabin.