A 13-year-old Prince William County youth yesterday was ordered to a state reform school for up to five years for brutally attacking a stewardess last fall in her Woodbridge home.

The youth, who was 12 when the attack occurred, was convicted Jan. 18 of attempted murder and attempted robbery in connection with the incident Oct. 16. The woman, Linda Cox, 32, of 2497 Fraser Court, was stabbed 15 times with a knife and suffered a punctured ear drum and lung during the attack.

Cox who has fully recovered from her injuries and was reportedly seeking to return to work as a senior flight attendent for United Airlines, told police at the time that the attack occurred moments after the youth appeared at the front door and asked "to borrow a plastic bag."

The athletically built, curly-haired youth was reportedly calm throughout yesterday's proceedings at which presiding Juvenile Court Judge Herman A. Whisenant ruled he would be sent to the Division of Youth Services in Richmond for diagnostic and psychological tests.

"After that, the appropriate persons will decide what reform school is best suited for his needs," assistant prosecutor Michael Dixon said. "There is no minimum sentence that he has to serve, but no one is expecting him to get out very soon."