This episode's headline: Damage Control; TWA: Debating Givebacks. The guests include In Washington: ALEXANDER TROWBRIDGE, National Association of; Manufacturers; JOAN CLAYBROOK, Consumer Advocate; In New York: CARL ICAHN, Chairman, Trans World Airlines; VICKI FRANKOVICH, Flight Attendants Union; Reports from NewsHour Correspondents: ELIZABETH BRACKETT, at Cape Canaveral. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor