ADS-B Out Installations Must Support Pilot-Entered Data The FAA recently published a Legal Interpretation regarding Flight ID that essentially requires the aircraft Flight ID (either aircraft call sign or aircraft registration number) to be accurate to the aircraft’s flight plan. Therefore, if the aircraft operates or is likely to operate with a dynamic call sign, the ADS-B Out installation must be able to support pilot-entered Flight ID in order to be rule compliant.
Source: aero newsFAA Publishes Legal Interpretation Concerning Flight ID