What do all cartridge actuated devices and propellant actuated devices (CAD/PAD) have?

All cartridge actuated devices and propellant actuated devices (CAD/PAD) have a defined service life because they are designed to work effectively within certain operational limits and periods. This service life ensures that the devices perform reliably and safely in critical situations. Over time, environmental factors, usage, and aging can affect the integrity and performance of these devices, making it essential for them to have a specific timeframe within which they can be confidently utilized.

Having a defined service life allows for systematic inspections, replacements, and maintenance schedules, ensuring that the equipment remains safe and effective when needed. Understanding and adhering to the defined service life is crucial for aircrew safety and mission success, which is why this standard is critical in the aviation and defense sectors.