Soar to New Heights with the 2026 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

The inspection frequency for a transponder is indeed every 24 calendar months. This interval is established by regulatory standards to ensure that the transponder is functioning correctly and meets the required performance specifications for aviation safety. The transponder is a critical component in the aircraft's avionics system, which helps in identification and positioning of the aircraft in relation to air traffic control and surrounding traffic, thus contributing to overall flight safety.

While other inspection frequencies might apply to different systems or components within the aircraft — for instance, certain maintenance checks may occur annually or every several hundred hours — the specific requirement for the transponder is set at 24 months. This ensures that your transponder is regularly verified and calibrated, minimizing the risk of malfunction that could compromise safety or lead to incomplete communication with air traffic controllers.