As the pilot of a retractable landing gear aircraft, when must you report "gear down"?

Reporting "gear down" is a critical communication for flight safety, particularly in retractable landing gear aircraft. This call should be made before crossing the runway threshold, which means the pilot confirms that the landing gear is extended and locked in place before the aircraft enters the final approach phase for landing.

This timing ensures that both the pilot and air traffic control are aware that the aircraft is configured properly for landing, mitigating the risk of a gear-related mishap during touchdown. By confirming the gear status before crossing the threshold, the pilot provides an additional layer of safety and communication to ensure readiness for landing.

Other options do not capture the necessary timing for such a report. Reporting during the landing roll might be too late to inform either the control tower or other pilots about the aircraft's landing configuration. Similarly, while entering the traffic pattern or after crossing the runway threshold does not provide adequate assurance of gear status before committing to the final approach. Hence, it is crucial to report "gear down" before crossing the runway threshold to maintain safe operational practices and ensure clear communication.