H.R.4177: To amend title 49, United States Code, to authorize the Assistant Secretary of Homeland Security (Transportation Security Administration) to designate Federal special security zones at airports, and for other purposes.

Airport Security Enhancement Act of 2007 - Amends federal transportation law to authorize the Assistant Secretary of Homeland Security (Transportation Security Administration) to: (1) designate certain airport areas (tarmacs, aircraft, baggage handling areas, baggage loading areas, and such other areas as the Assistant Secretary determines appropriate) as Federal Special Security Zones; and (2) issue a badge authorizing certain qualified individuals access to such zones. Restricts access to a Federal Special Security Zone to individuals who require access because of their employment and who have obtained a badge. Prohibits the use of a state issued badge to gain access to a Federal Special Security Zone.