A More Enlightened Approach to Operational Checks

Unlike other handheld readout devices, the RSU is capable of displaying data in real-time engineering units.

Convenient. Engineering units provide a more convenient, understandable means of diagnosing Digital Flight Data Recording (DFDR) System problems than octal codes or blinking lights. An aircraft with diagnosed DFDR System failures may be quickly returned to service after replacing suspect components and performing requisite operational checks using an RSU .

A Parameter File is a database of Engineering Unit Conversion formulae. It contains the code necessary to create and display engineering units using the incoming raw octal data stream.

Cost Effective. Avionica parameter file generation services are your shortcut to better diagnostic productivity. All are priced based on number of parameters. Spend your time testing, not formulating.

A traceable document is necessary in order to generate a parameter file. Possession of such a document by the operator is an FAA requirement. These documents are often available from the airframe manufacturer, or the Flight Data Acquisition Unit (FDAU) manufacturer. The minimum contents necessary in order to create a parameter file are outlined in FAA Advisory Circular AC 20 -141, dated October 5, 1999. This document may be downloaded from http://www.airweb.faa.gov in .PDF document format.

Traceable documents must be maintained current with respect to any modifications that affect the Flight Data Recording System. Legacy aircraft may not have a document such as that described above, since so many earlier aircraft began life without Digital Flight Data Recorders at all, or with a minimal number of required parameters. In such cases, the most
recent DFDR parameter upgrade STC, with an accompanying STC test procedure may be sufficient to create the necessary documentation. If not, Avionica can often help in the preparation of such documents.

Once created, you can choose to maintain your own configurations, or take advantage of our configur ation management, and even our Internet hosting services.

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