This industry comprises establishments primarily engaged in providing specialized services for air transportation (except air traffic control and other airport operations).

Cross-References. Establishments primarily engaged in--

• Wholesaling fuel at airports--are classified in Industry 424720, Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals);
• Providing aircraft janitorial services--are classified in Industry 561720, Janitorial Services;
• Providing air traffic control services--are classified in U.S. Industry 488111, Air Traffic Control;
• Providing airport operations (except air traffic control)--are classified in U.S. Industry 488119, Other Airport Operations;
• Providing factory conversion, overhaul, and rebuilding of aircraft--are classified in Industry 33641, Aerospace Product and Parts Manufacturing; and
• Providing food services to airlines on a contractual arrangement--are class ified in Industry 722310, Food Service Contractors.