This standard provides guidance to the maintenance community for identifying the modification status of avionics components and for preparing avionics service bulletins. This standard coordinates various methods used by airframe manufacturers and operators, for marking or identifying avionics that has been modified.
SAE ARINC422-1-2016 history
2016SAE ARINC422-1-2016 GUIDANCE FOR MODIFICATION STATUS INDICATORS AND AVIONICS SERVICE BULLETINS