Jan 1 (Reuters) - Contact was lost on Monday with an Adam Air passenger plane on an internal flight in Indonesia with 96 passengers and six crew on board.

Following is a list of some of Indonesia's worst air disasters:

* Sept. 26, 1997 - A Garuda Airbus A-300B4 crashes in a mountainous area of northern Sumatra near Medan. All 222 passengers and 12 crew are killed in Indonesia's worst air disaster.

* Dec 19, 1997 - All 104 people on board a Singapore SilkAir Boeing 737-300 are killed when it crashes near the Sumatran city of Palembang.

* Oct. 12, 2004 - An Indonesian military helicopter crashes in the northern separatist province of Aceh on Sumatra, killing all eight soldiers on board, with bad weather a possible cause.

* Nov. 30, 2004 - A Lion Air MD-82 plane carrying 146 passengers and seven crew skids off a rain-slick runway at Solo in central Java, killing 31 people and injuring dozens.

* Dec. 23, 2004 - An Indonesian military helicopter crashes in Central Java province, killing all 14 air force personnel on board. Bad weather was cited as the cause.

* April 2, 2005 - A Sea King helicopter on an aid mission goes down on Indonesia's quake-hit Nias island in Australia's worst post-Vietnam War operational loss of military personnel, killing nine.

* Sept. 5, 2005 - A Boeing 737-200 belonging to Indonesian carrier Mandala Airlines, crashes in a residential area of Indonesia's third biggest city Medan, killing 102 aboard and 47 local residents in an inferno on the ground.

* Jan 1, 2007 - Contact is lost with an Adam Air passenger plane flying from Surabaya to Manado with 96 passengers and six crew on board.

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