Taking AVABAG avalanche backpacks onto planes is generally allowed. Together with the filled cartridge, they fall under the IATA (International Air Transport Association) dangerous good regulations and are listed in table 2.3A. During transport, the AVABAG cartridge must remain disconnected from the AVABAG system to prevent accidental activation. The cartridge must only be transported with its protective cap screwed on.
Transporting the AVABAG backpack is allowed by airlines, but only in accordance with the following points: The AVABAG system must be installed in the AVABAG backpack. The cartridge must not be screwed in, but must be transported inside the AVABAG backpack.
Ask your airline about their guidelines.
If you wish to send the AVABAG cartridge, inform the transport company about the filled cartridge. The information required by the transport company can be found on the cartridge.