What is the maximum weight of dry ice allowed onboard with passengers?

The correct maximum weight of dry ice allowed onboard with passengers is 441 lbs. This limit is established for safety reasons, as dry ice sublimates into carbon dioxide gas, which can pose a risk of asphyxiation in confined spaces if not properly managed. Regulatory guidelines are designed to ensure that the concentration of carbon dioxide produced by the dry ice remains at safe levels, balancing operational needs with passenger safety.

The figure of 441 lbs serves as a critical threshold, ensuring that the air quality within the aircraft cockpit and passenger cabin remains within acceptable limits. This weight is also relevant in the context of total cargo weight, as aircraft have strict weight capacity limits that affect performance, safety, and compliance with regulatory standards.

Understanding this limit helps in planning for both cargo and passenger safety while adhering to the operational guidelines set forth by aviation authorities.