{"id":"F2006B06483","name":"AD/RAD/19 - \"Aircom\" VHF Transceiver - Modification","slug":"ad-rad-19-aircom-vhf-transceiver-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48006,"registerId":"commonwealth-F2006B06483-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RAD/19 - \"Aircom\" VHF Transceiver - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Radio Communication and Navigation Equipment\n\n \n\nAD/RAD/19 “Aircom” VHF Transceiver - Modification 1/68\n\nApplicability: “AIRCOM” LVC-4 series Transceivers below S/No. 499.\n\n \n\nRequirement: Modify the equipment to reduce harmonic radiation from the trans-mitter to at least 40 decibels below the mean carrier level, and to ensure that the receiver radiations are not more than 50 millimicro watts.\n\n \n\nNote: A suitable band pass filter installed in the transmission line close to the transceivers is an acceptable method of compliance.\n\n \n\nCompliance: Before 1 July 1968.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":833},"content_quality":"ok","complexity_score":2,"rejection_reason":"","scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope focused solely on harmonic radiation modifications for the specified Aircom LVC-4 transceivers. There is no evidence of scope creep or expansion beyond the initial technical safety requirement."},"complexity_factors":["Single, specific technical requirement with quantitative thresholds (40 decibels, 50 millimicro watts)","No cross-references to other legislation or regulations","Only one exception/alternative compliance method mentioned (band pass filter)","Very narrow applicability (specific manufacturer model and serial number range)"],"plain_english_summary":"Owners/operators of aircraft fitted with Aircom LVC-4 VHF transceivers (serials <499) must modify those radios—typically by adding a band‑pass filter or equivalent—to stop harmful harmonic emissions and excessive receiver radiation. The goal is to reduce transmitter harmonics and limit receiver radiation to protect other avionics and ground/air communications. Compliance was required before 1 July 1968 because unchecked emissions can disrupt critical communications and aircraft systems."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification","history":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification/history","analysis":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification/analysis","conflicts":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification/conflicts","importantCases":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification/important-cases","documents":"/api/acts/ad-rad-19-aircom-vhf-transceiver-modification/documents"}}