The AFI module is used as interface between the DME ground beacon and an associated VHF equipment to make the emission of the identity code expressed in international Morse code synchronous.This module allows the identification signals to be correctly exchanged between the DME and associated equipment (e.g. VOR, ILS, and MLS equipment). If any, as far as the identity code and the status signals are concerned.
figure of Defective AFI
We experienced this trouble when the DME equipment shuts down on both system. We checked the system and it found that AFI is defective because of burned out module and LED's in front doesnt blinking at all. The remedy is only buying a new module since all individual components of AFI are surface mounted.
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