{"id":"F2006B06486","name":"AD/RAD/22 - Press-to-Talk Assembly - Modification","slug":"ad-rad-22-press-to-talk-assembly-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48016,"registerId":"commonwealth-F2006B06486-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RAD/22 - Press-to-Talk Assembly - 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/22 Press-to-Talk Assembly - Modification 2/71\n\nApplicability: Aerosound 555-900 Press-to-Talk Assembly.\n\n \n\nRequirement: Modify the Press-to-Talk Assembly to ensure that a transmitter will not remain energised after the Press-to-Talk button is released.\n\n \n\nNote: Incorporation of Air Communications Pty. Ltd. modification specification. AC- M-1004 is an acceptable means of compliance.\n\n \n\nCompliance: Before 1 April 1971.\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":1332},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive retains its original narrow, technical scope targeting a specific radio component safety defect."},"complexity_factors":["Single, specific applicability (one part number only)","Single unambiguous safety requirement","No interpretation section or defined terms","No nested exceptions or conditional clauses","Only one cross-reference (to the acceptable modification standard)"],"plain_english_summary":"**What this is:** An aviation safety rule (called an Airworthiness Directive) that mandates a specific fix for a radio part in aircraft.\n\n**The problem:** The **Aerosound 555-900 Press-to-Talk Assembly** (the button pilots press to speak over the radio) has a fault where the transmitter can stay switched on even after the pilot releases the button. This creates a \"stuck mic\" situation that blocks the radio frequency and prevents other pilots from communicating.\n\n**Who must act:** Aircraft owners or operators with this specific radio part installed.\n\n**What must be done:** Modify the assembly so the transmitter reliably switches off when the button is released. The modification must follow the technical specification **AC-M-1004** from Air Communications Pty. Ltd.\n\n**Deadline:** The work had to be completed before 1 April 1971 (this is a historical directive)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rad-22-press-to-talk-assembly-modification","history":"/api/acts/ad-rad-22-press-to-talk-assembly-modification/history","analysis":"/api/acts/ad-rad-22-press-to-talk-assembly-modification/analysis","conflicts":"/api/acts/ad-rad-22-press-to-talk-assembly-modification/conflicts","importantCases":"/api/acts/ad-rad-22-press-to-talk-assembly-modification/important-cases","documents":"/api/acts/ad-rad-22-press-to-talk-assembly-modification/documents"}}