A Swiss federal court sentenced a 23-year-old Lebanese to life imprisonment Friday for the hijacking to Geneva 19 months ago of an Air Afrique Airliner in which a French passenger was killed.

Court president Jean-Jacques Leu said the five-judge panel could find no extenuating circumstances in the way Hussein Mohammed Ali Hariri, a Moslem Shiite, carried out the July 24, 1987, hijacking."And there were no honorable motives for this action nor any sincere regrets on the part of the accused for the death of Xavier Beaulieu,," he added.

The bearded Hariri stood motionless as Leu, delivering the verdict after a five-day trial, said the court could not go along with Hariri's version that he had killed Beaulieu in self-defense after the Frenchman got up from his seat and threatened him.