The FAA is supposed to pass regulations relating to this law by. to carry a musical instrument that is too large to meet the requirements of. Dec 14, 2003. Carry-on regulations may leave travelers holding the bag. Rules are confusing among the FAA, the Transportation Security. you to take one musical instrument , besides your "one-plus-one" allowance, through checkpoints. FAR-FC 2019: Federal Aviation Regulations for Flight Crew (FAR/AIM Series) [Federal…