TODAY: One person is killed and three others injured in a tour helicopter crash in Ha'ena on Kaua'i's North Shore.

Thursday, March 8, 2007: Three people are killed when a Heli USA tour helicopter goes down on the northwest end of the Princeville, Kaua'i, airport after the pilot reports hydraulics problems.

Sept. 23, 2005: A Heli USA tour Aerospatiale AS350 helicopter with six people aboard crashes into the ocean off Ha'ena, Kaua'i, killing three.

Sept. 24, 2004: A Bali Hai Helicopters Bell 206B hits a cliff near Mount Kahili, Kaua'i, killing five.

July 23, 2003: A Jack Harter Helicopters Bell 206B crashes at Mount Wai'ale'ale, Kaua'i, killing five.

June 15, 2003: Three tourists and a pilot are killed when a Tropical Helicopters Hughes 500 crashes in Hawai'i Volcanoes National Park on the Big Island.

July 21, 2000: A Blue Hawaiian Tours Aerospatiale AS355 helicopter crashes in 'Iao Valley on Maui, killing seven. The NTSB cites pilot error, for flying into cloudy weather.

June 25, 1998: A Eurocopter AS350 aircraft operated by 'Ohana Helicopters smashes into Mount Wai'ale'ale, Kaua'i, killing six. The NTSB cites pilot error, for flying into bad weather.

July 14, 1994: A Papillon Helicopters Aerospatiale AS350 crashes into the ocean off Kaua'i's Na Pali Coast, killing three of seven people aboard. The NTSB cites engine failure.

April 18, 1994: An Interisland Helicopters Hughes 369D aircraft crashes near Hanapepe Valley on Kaua'i, killing one and injuring four. The NTSB cites engine failure.