What chime is heard when the landing gear is extended?

When the landing gear is extended, a Single Hi-Lo Chime is the auditory signal that pilots and crew members hear. This specific chime serves as a confirmation that the landing gear has been successfully deployed, which is a critical function for ensuring the safety of the aircraft during landing procedures. The sound is distinctively designed to alert the crew and confirm the change in gear status.

This particular chime emphasizes the importance of calling attention to the gear's condition, as it plays a vital role in the pre-landing checklist and overall situational awareness in the cockpit. Understanding this chime helps crew members align with standard operating procedures and reinforces the emphasis on aircraft safety.