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Australia Publishes Guidance for Fitment of Prototype Parts

The Australian Civil Aviation Safety Authority releases new guidance for the regulation that governs continuing airworthiness requirements for aircraft and aeronautical products.

Printed headline: 42.420

The Australian Civil Aviation Safety Authority has released new guidance for Civil Aviation Safety Regulation Part 42, which governs continuing airworthiness requirements for aircraft and aeronautical products.

The revision provides an acceptable means of compliance (AMC) for 42.420, which requires an “authorized release certificate” for new, non-standard parts. The new guidance—AMC 42.420(5)(a)(i)—offers a compliance means for entities to use when a release certificate is not provided for prototype parts developed as part of a U.S. supplemental type certificate (STC).

Steve Mann

In those instances, “the prototype part must be supplied with a properly completed FAA Form 8130-3 that includes a statement of conformity to the current unapproved design data for the part.” After fitment of the part, the return to service may be issued when accompanied with the STC approval and STC holder letter of conformity. 

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