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Project CS 12/04 - Review of AD/ENG/4
This project will review the engineering assumptions and conditions that allow engines to run beyond the manufacturers recommended overhaul period under the current CASA AD/ENG/4 Amendment 11 - Piston Engine Continuing Airworthiness Requirements.
The AD has gone through 11 amendments in an attempt to convey CASA policy on piston engine flight and calendar time between overhauls. A review of the A/ENG/4 Amendment 11, based upon a review of the validity of the original engineering assumptions upon which the current policy was based (some dating back to the 1940's) was conducted in the light of twenty years of SDR data and the ATSB Report B20070191 "Aircraft Engine Failure: An analysis of Failure in a Complex Engineered System": This review has indicted that some of the original engineering assumptions on which the AD is based are no longer valid. Further to this CASA should legislate its policy in delegated legislation rather than an AD.
To clarify CASA policy on "Piston Engine Continuing Airworthiness Requirements" and to locate the requirements in an appropriate legislative document such as the Part 90 MOS.
CASR Part 90 MOS
This project was approved by Peter Boyd, Executive Manager Standards Development & Future Technology Division on 25 January 2012.
Project Leader: email@example.com
Project Sponsors: Peter Boyd
Standards Development Project Manager: Ben Challender
|Consultation updates in 2012|
|Project CS 12/04 - Review of AD/ENG/4||Project approved||31 Jan 2012|