WASHINGTON -- Glitches in a system designed to alert the military about security breaches over the nation's skies added more confusion to the recent debacle in which a Northwest Airlines jet flew 150 miles past its destination, federal investigators reported Wednesday.

Attempts to reach the pilots on Flight 188, which made a bizarre odyssey across the Midwest Oct. 21 without talking to controllers for an hour and 17 minutes, were hindered by a string of errors, glitches and miscommunications, according to hundreds of pages of documents released by the National Transportation Safety Board (NTSB).

The documents also add new details to the frantic moments in the cockpit when the pilots first realized what had happened.

The pilots told investigators that they had no idea anything was wrong until flight attendant Barbara Logan called on an intercom to ask when they would be landing. The pilot who answered told her he was "hosed" and hung up, Logan said.

Capt. Timothy Cheney of Gig Harbor, Wash., told investigators he was "in shock" when he looked up at a computer screen that displays flight information on the Airbus A320 and saw that it was largely blank because the jet had already flown its assigned route.

Cheney and co-pilot Richard Cole of Salem, Ore., were stripped of their pilot licenses by the Federal Aviation Administration (FAA). Both men have appealed the revocations.