What action should be taken for an inoperative transponder?

When dealing with an inoperative transponder, the appropriate course of action is to inform air traffic control that the assigned code is not displayed. This communication is essential because the transponder plays a critical role in identifying and tracking aircraft on radar. By advising air traffic control, you ensure they are aware of the situation and can provide any necessary instructions or modifications to your flight operations.

The transponder's failure to operate does not mean that the aircraft cannot continue to operate. Instead, it necessitates proper communication to maintain safety and situational awareness for all parties involved. Notifying air traffic control allows them to adjust their monitoring and provide guidance as needed. Thus, reporting the inoperable transponder enables safe navigation and ensures compliance with air traffic regulations.

In contrast, other options like ignoring the issue or requesting a new flight plan do not align with standard procedures for dealing with equipment malfunctions, while an immediate landing might be excessive unless further complications arise. Effective communication is key to maintaining safety in the airspace system.