Hawaiian Air Lines (and Aloha before it went under) use ETOPS, or Extended Range Twin Engine Operational Performance Standards, which allows 2-engine jets to fly to the islands from the Mainland. 2 engine planes were previously not allowed on the West Coast-Hawaii routes, which average 2200 miles one-way as the crow flies.
ETOPS is fondly known by pilots as "Engines Turn or Passengers Swim".
"A Hawaiian Airlines flight from Honolulu to Portland loses one of its engine during mid-flight. Flight 26 left Hawaii Wednesday afternoon and almost made it half way to Oregon when the pilot decided to turn around. The plane was re-routed to Kahului Airport on Maui after the left engine went out."
Rest of story, with video:
http://kgmb9.com/main/content/view/6487/40/