The Liquid 3-1-1 Rule refers to the sizes of gels and soaps you are allowed to bring on board. The rule states that you are permitted to bring 3.4 ounce (100ml) bottles and they must be stored in a clear plastic zip-top bag in your carry-on baggage. Each passenger can bring one quart-sized bag. All other liquids and bottles that don't fit into the quart-sized bag in your carry-on baggage must be packed separately in your checked-in luggage.
The Transportation Security Administration restricts items from being carried on that are considered dangerous. This includes, knives of any kind or razors, sporting equipment like hockey sticks or pool cues, tools, self-defense items and any type of gun. The restriction for carry-on items includes flammable items such lighters, fuels, explosives and aerosol cans. All these items must be checked in and, in the case of guns or weapons, registered with the airline.
Each passenger is permitted one carry-on item and one personal item. Personal items are defined as a purse, briefcase or laptop bag. Weight restrictions for carry-on items state that each passenger can have a carry-on that weighs up to 40 pounds. Size restrictions state that the carry-on item should be no larger than 14 x 9 x 22-inches. All items larger than this need to be checked in.
US airways permits passengers with certain "necessity" items from having to pay extra to transport these items. These items include mobility-assistive devices like wheelchairs, canes or crutches, stroller and car seats. Medical items are allowed on flights free of charge, provided they are packaged separately from other carry-on items and meet weight and size restrictions. Volumes of medication that exceed the 3.4 ounces (100ml) limit are permitted by the TSA and US Airways to be carried aboard. The only requirement is that they must be kept in a separate bag from other toiletries or cosmetics and declared to a Transportation Security Officer for inspection prior to boarding.
