July 22 (Reuters) - The Federal Aviation Administration

on Tuesday agreed to delay by one year a requirement that was

set to take effect in August that new passenger airplanes have

a secondary barrier to the flight deck to prevent intrusions.

Airlines for America, the trade group representing American

Airlines ( AAL ), United Airlines, Delta Air Lines ( DAL )

and other major carriers, had asked the FAA to delay

compliance by two years because the agency has not yet approved

a secondary cockpit barrier, and no manuals, procedures or

training programs have been authorized.