In response to smoke, fire, or fumes without a CAS message, what should the crew establish?

When smoke, fire, or fumes are detected without a CAS (Centralized Fault Display) message, the priority for the crew is to establish clear communication among team members. This step is essential because it ensures that all crew members are aware of the situation and can coordinate their actions effectively. Good communication allows the crew to assess the situation collectively, share information regarding the source of the issue, and decide on appropriate actions to mitigate potential hazards.

By establishing crew communication, the team can quickly gather information regarding the symptoms everyone is experiencing and determine a collective response plan. This may include evaluating if there is a need for further action, such as locating the source of the smoke or fumes, preparing for a possible emergency landing, or getting passengers ready for evacuation if necessary.

This focus on communication is critical, especially when immediate decisions are required in an environment where visibility may be compromised, and panic can easily set in. Overall, the establishment of crew communication is foundational for the subsequent steps that may be necessary to ensure the safety of everyone on board.