{"id":"F2006B10284","name":"AD/GENERAL/53 - Flight Data Recorder Underwater Locating Device - Installation","slug":"ad-general-53-flight-data-recorder-underwater-locating-device-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55974,"registerId":"commonwealth-F2006B10284-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GENERAL/53 - Flight Data Recorder Underwater Locating Device - Installation","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAircraft \\- General\n\nAD/GENERAL/53 Flight Data Recorder Underwater\n\nLocating Device \\- Installation\n\n  \n4/78\n\nApplicability: All aircraft with a maximum take-off weight in excess of 5700 kg which are either turbine powered or of a type first certificated in their country of origin on or after 1st January 1965 and which are fitted with an approved flight data recorder.\n\nRequirement: Install an approved underwater locating device on the flight data recorder in such a manner that it is not likely to be separated during crash impact.\n\nNote: Acceptable performance standards for an underwater locating device are described in Advisory Circular AC No. 21-10 “Flight Recorder Underwater Locating Device” issued by the Federal Aviation Administration of the United States of America.\n\nCompliance: Before 1 January 1979.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2707},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, targeted scope focused specifically on mandating underwater locating devices for flight data recorders on larger aircraft. There is no evidence of scope creep or expansion beyond this original aviation safety purpose."},"complexity_factors":["Single operative requirement with clear installation instruction","Applicability criteria based on technical specifications (weight threshold of 5700 kg, engine type, certification date)","External cross-reference to FAA Advisory Circular AC 21-10 for performance standards","No interpretation section, nested exceptions, or complex conditional logic"],"plain_english_summary":"This rule requires large aircraft that already carry flight data recorders to have an underwater locating beacon attached to the recorder so it remains with the unit after a crash. It applies to aircraft over 5,700 kg at takeoff that are turbine-powered or were first certified on/after 1 Jan 1965.\n\nThe beacon must meet FAA Advisory Circular AC 21-10 standards and be installed by 1 January 1979 to aid recovery of recorders after water crashes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation","history":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation/history","analysis":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation/analysis","conflicts":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation/conflicts","importantCases":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation/important-cases","documents":"/api/acts/ad-general-53-flight-data-recorder-underwater-locating-device-installation/documents"}}