{"id":"F2006B11272","name":"AD/MCH/5 - Low Airspeed Aural Warning Device - Installation","slug":"ad-mch-5-low-airspeed-aural-warning-device-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57070,"registerId":"commonwealth-F2006B11272-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MCH/5 - Low Airspeed Aural Warning Device - Installation","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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aero Resources J2 Series Gyroplanes\n\n \n\nAD/MCH/5 Low Airspeed Aural Warning Device - Installation 10/74\n\nApplicability: All model J2.\n\n \n\nRequirement: Install a low airspeed warning device to give aural warning at 38 to 43 knots inclusive, while the aircraft is airborne, in accordance with a scheme approved by the Secretary.\n\n \n\nThe system shall be equipped with a fuse or circuit breaker which shall be installed within reach of the pilot.\n\n \n\nNote: Modification to Hawker de Havilland Aircraft Pty. Ltd. drawings 26-D-3 issue 3 and 26-C-2 is an acceptable means of compliance.\n\n \n\nCompliance: Before issue of a Certificate of Airworthiness.\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":1539},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: mandating a specific safety modification for J2 gyroplanes. It has not expanded beyond this narrow technical scope."},"complexity_factors":["Single, specific requirement for one aircraft model only","Short text with minimal defined terms","Requires external technical compliance (specific engineering drawings)","Involves administrative approval process ('scheme approved by the Secretary')","Precise technical calibration required (38-43 knot range)"],"plain_english_summary":"This is a safety rule for **Aero Resources J2 gyroplanes** (a type of small rotorcraft). It requires owners to install a **low-speed warning alarm** that beeps when the aircraft slows to between 38 and 43 knots (about 70–80 km/h) while flying.\n\n**What must be done:**\n- Install an audible warning device that activates at low airspeed\n- Include a fuse or circuit breaker that the pilot can reach while flying\n- Get the installation scheme approved by the aviation authority (the Secretary)\n\n**When it applies:**\nBefore the aircraft can receive its **Certificate of Airworthiness** (the official document allowing it to fly legally).\n\n**Why it matters:**\nGyroplanes are vulnerable to losing lift at low speeds. This warning helps pilots avoid dangerous slow-flight conditions that could lead to accidents.\n\n*Note:* Using specific Hawker de Havilland technical drawings (26-D-3 and 26-C-2) is an acceptable way to meet this requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation","history":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation/history","analysis":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation/analysis","conflicts":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation/conflicts","importantCases":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation/important-cases","documents":"/api/acts/ad-mch-5-low-airspeed-aural-warning-device-installation/documents"}}