Need the name of a movie approximately 20 years old, opens with a plane crash in the Pacific. Female leaves the plane.. cannibals end up eating her and one other person on the plane.. remaining (pilot)? Is befriended by another tribe that is trying to keep the cannibals from eating them... sound familiar??

I haven't seen this, but the description has some similarities to what you've described so I thought I'd put it out there;

Ultimo mondo cannibale (1977) - Plot summary (http://www.imdb.com/title/tt0078437/plotsummary)

Aka
Cannibal (UK) (video title)
Carnivorous (USA) (reissue title)
Jungle Holocaust (USA) (DVD box title)
Last Cannibal World (International: English title)
The Last Survivor (USA) (censored version)

Also almost sounds like 'survivor' by stephen king. But I am not sure if he made that into a movie or not