{"id":"F2006B06504","name":"AD/RAD/47 Amdt 1 - Periodic Testing of ATC Transponders","slug":"ad-rad-47-amdt-1-periodic-testing-of-atc-transponders","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48073,"registerId":"commonwealth-F2006B06504-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RAD/47 Amdt 1 - Periodic Testing of ATC Transponders","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nRadio Communication and Navigation Equipment\n\nAD/RAD/47\n\nAmdt 1\n\n  \nPeriodic Testing of ATC Transponders 11/94\n\nApplicability: All Air Traffic Control transponders.\n\nRequirement: Perform a system test in accordance with the requirements contained in United States Federal Aviation Regulations Part 43 Appendix F. Code 2100 should be used when carrying out transponder tests.\n\nCompliance: The compliance for the original issue of this directive was within 24 calendar months from 23 July 1992 and thereafter at either:\n\n    intervals not exceeding 24 calendar months, or\n\n    b. intervals approved in accordance with a System of Maintenance for the aircraft pursuant to Civil Aviation Regulation 42M.\n\nThe compliance remains unchanged and this amendment becomes effective on 13 October 1994.\n\nNote: Consideration should be given to aligning this inspection/test with that required by AD/RAD/43.\n\nBackground: This Directive was originally issued to introduce a procedure additional to the transponder self check prescribed in Civil Aviation Regulations, Schedule 5, Section 5 sub-paragraph (4)(k) and to align with the requirements of overseas Civil Aviation Regulatory Authorities. This amendment is issued to advise of a new code, compatible with Air Traffic Control requirements, to be used when testing transponder systems.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2652},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment (Amdt 1) does not alter the scope of the original directive. It merely updates the technical code to be used during testing (Code 2100) and establishes the effective date. The fundamental requirement for biennial transponder testing remains unchanged."},"complexity_factors":["Single, clearly defined applicability (all ATC transponders)","One external regulatory cross-reference (US Federal Aviation Regulations Part 43 Appendix F)","Alternative compliance pathway referencing Civil Aviation Regulation 42M","Brief document with minimal conditional logic"],"plain_english_summary":"This rule requires aircraft owners to have ATC transponders periodically tested—normally every 24 months—using FAA Part 43 Appendix F procedures and Test Code 2100, or a different interval if approved in the aircraft’s certified maintenance schedule (System of Maintenance). \n\nIt applies to any aircraft with a transponder and ensures signals accurately identify altitude and identity to controllers, improving safety and aligning Australian practice with international standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders","history":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders/history","analysis":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders/analysis","conflicts":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders/conflicts","importantCases":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders/important-cases","documents":"/api/acts/ad-rad-47-amdt-1-periodic-testing-of-atc-transponders/documents"}}