A small private plane crashed Saturday in the Pacific about 40 miles west of Half Moon Bay, California, following an emergency call for help, killing two people aboard.
The National Transportation Safety Board said the plane was a Viking Air DHC-6-400 Twin Otter, headed from Santa Rosa-Sonoma County airport to Honolulu.
Two hours later it was forced to turn around due to what the pilot told air traffic controllers were "mechanical issues," a U.S. Coast Guard spokesman said.
