No person may operate an airplane unless it is equipped with:

The requirement for an airplane to be equipped with hand fire extinguishers that are properly secured in the passenger compartment is essential for safety in emergency situations. Fire is one of the potential hazards in aviation, and having fire extinguishers readily accessible allows for a timely response should a fire occur. Ensuring that these extinguishers are securely stored prevents them from becoming projectiles in the event of turbulence or an accident, thereby enhancing the overall safety of the aircraft and its occupants.

While other options may also contribute to safety, they do not reflect the fundamental operational requirements set by aviation regulations concerning what is mandatory for aircraft operation. For example, a first-aid kit, a working radio communication system, and emergency parachutes may be beneficial but are not universally mandated for all aircraft operations in the same manner as having securely stowed fire extinguishers in the passenger compartment.