A broomstick presented as a carry-on item would likely be classified under existing TSA rules governing sporting equipment and long rigid objects, though its enchanted flight capability introduces classification questions current regulations do not explicitly address.
X-ray screening would almost certainly flag the item for secondary inspection, since the internal enchantment structure would produce an anomalous density signature unlike any conventional wooden or composite item currently in the prohibited or permitted items database.
Secondary screening protocol should follow standard procedure for unidentified anomalous items, including manual inspection and swab testing for prohibited substances, though agents would need specific training to distinguish magical residue from genuine security threats.
Functional testing presents an obvious safety concern. Standard procedure for testing whether an item performs a claimed function does not anticipate a screening agent needing to verify actual flight capability in a confined checkpoint environment.
Classification as a potential weapon is a reasonable concern, given that a broomstick capable of independent flight and directional control shares functional characteristics with items typically restricted from cabin carriage under current aviation security guidelines.
Documentation requirements would likely include a declaration of the item's enchanted status, similar to existing special item declarations for oversized sporting equipment, allowing screening staff to apply appropriate handling procedures in advance.
The most practical near-term recommendation for magical carriers is to check enchanted broomsticks as registered luggage rather than attempting carry-on transport, avoiding the checkpoint delay and classification ambiguity entirely.