BAGHDAD, Feb 2 (Reuters) - The U.S. military in Iraq said it was checking whether a helicopter came down just north of Baghdad on Friday. "We're looking at reports of a possible aircraft down," a spokeswoman, Lieutenant Colonel Josslyn Aberle, said when asked about reports from residents near the major U.S. air base at Taji that they saw a helicopter come down shortly after dawn. U.S. embassy spokesman Lou Fintor also said: "We're looking into the reports."