In connection with processing asynchronous streams of aircraft telemetry data, data processing logic is developed to run on multiple aircraft, even if different avionics equipment are installed on the aircraft. An electronic inventory system tracks data available on affected aircraft. A set of “global” data elements applicable to aircraft in a fleet is defined and is tracked in the electronic inventory system, with relationship to the underlying native data elements and specific aircraft. The global units are derived as appropriate, for each specific aircraft avionics environment. An interface enables definition of data processing logic that is integrated with the electronic inventory system and ensures the general validity of the defined logic. The data processing logic is deployed to one or more aircraft in a function integrated with the electronic inventory system, to ensure the validity of the data processing logic for each aircraft specified as a deployment target.