The TSA prohibits some items from airplanes, both in checked and carry-on luggage. These prohibited items include flares, gun powder, explosive materials of any kind, flammable substances such as gasoline or cooking fuel, and some chemicals, such as bleach and pool chlorine. Spillable batteries, spray paint and large printer cartridges are also prohibited.
Some items are permitted in checked baggage, but should not be carried there for security reasons. The TSA recommends against packing jewelry, money, electronics and fragile items in checked baggage to avoid breakage or theft. Film should not be packed since X-ray screening equipment may damage it.
All checked baggage must be available for inspection by the TSA. This means you must not lock checked baggage or you must use a special lock approved by the TSA. If the TSA cannot get into a bag, authorized personnel may break the lock.
