What is the first step when an aircraft reports a malfunction with a ground-based NAVAID?

When an aircraft reports a malfunction with a ground-based NAVAID, the first logical step is to request a report from another aircraft. This step helps to verify the reported issue. By obtaining a second opinion from another aircraft in the vicinity, air traffic control can discern whether the malfunction is affecting multiple aircraft or if it is an isolated incident. This information is crucial for assessing the situation accurately and deciding on the next steps.

Collecting information from other aircraft allows for a more informed response, potentially avoiding unnecessary actions that might disrupt operations or create confusion if the NAVAID is functioning correctly for some users. Establishing a cross-reference helps maintain safety and efficiency in air traffic management.

While notifying the FLM or canceling the use of the NAVAID could eventually be necessary steps, these actions typically follow the verification process to confirm the malfunction's validity. Advising the pilot to use GPS may be a fallback option, but that directive relies on human factors and should not be the first action taken without confirming the extent of the NAVAID issue.