How do crew members communicate discreetly when a security threat is suspected?

• A. Use coded phrases or discreet signaling methods established by the airline, such as interphone or badge system; avoid alarming passengers.
• B. Publicly announce in the cabin to alert passengers.
• C. Use the PA system to warn all passengers.
• D. Ignore the threat and continue service.

Answer: (D)

When a security threat is suspected, crew communication must be discreet and coordinated to act quickly without alarming passengers. The best approach is to use coded phrases or discreet signaling methods established by the airline, such as the cabin interphone or a security signaling system, so crew can alert the flight deck and ground security without tipping off the potential threat or causing panic in the cabin.

This keeps passengers calm while enabling a rapid, coordinated response—securing the cabin, guiding passenger movement if needed, and notifying authorities for further action. Publicly announcing in the cabin or over the PA to warn all passengers can trigger panic and tip off the threat, potentially compromising safety. Ignoring the threat is unsafe and violates crew safety duties.