LOS ANGELES (AP) _ A fraternity songbook whose lyrics celebrate sadistic sex and mutilation of women has been condemned as ''unconscionable'' by the chancellor of the University of California, Los Angeles.

The songbook was produced by a fraternity, Phi Kappa Psi, that lost its affiliation with UCLA and was suspended by its national organization last June because of a series of events involving off-color and sexist remarks.

The fraternity distributed to pledges a book of songs that feature raunchy lyrics focusing on acts of violence against women that include use of instruments of sexual torture.

Chancellor Charles E. Young ordered an investigation Thursday of Phi Kappa Psi, which continues to meet, off campus.

''I am revolted that a fraternity songbook exists at UCLA that contains lyrics that are sexist, homophobic and violent,'' Young said in a statement. ''I find it unconscionable that such a document could be created by UCLA students.''

Winston Doby, vice chancellor for student affairs, said the question of what action to take is complicated by the fact that Phi Kappa Psi no longer has any official status on campus.

It was not clear whether the songbook, dated 1989, continued to be used after the fraternity was disciplined in June.

The songbook surfaced several weeks ago when someone left a copy at the campus office of UCLA's feminist magazine, Together.

''We want some action taken against a system that allows and accepts these attitudes as normal,'' said Katrina Foley, co-editor of the magazine. ''We want whatever it takes to eliminate this kind of violence against women.''

The president of Phi Kappa Psi confirmed the songbook was given to pledges by some member of the fraternity.

''I don't know who did that. It's been confiscated since then by our pledge trainers and destroyed. Our alumni advised us to do that,'' said Chris Lee, the fraternity president.