{"id":"F2006B05419","name":"AD/PA-22/15 Amdt 1 - Brake Master Cylinder Diaphragm - Replacement","slug":"ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46091,"registerId":"commonwealth-F2006B05419-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-22/15 Amdt 1 - Brake Master Cylinder Diaphragm - Replacement","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)  Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes\n\n \n\nAD/PA-22/15\n\nAmdt 1\n\n\nBrake Master Cylinder Diaphragm - Replacement 11/67\n\n \n\nApplicability: All models fitted with Scott brake master cylinder P/N B711.\n\n \n\nRequirement: Install new brake master cylinder diaphragms, Scott P/N B1751 (Piper P/N 750 384). Compliance:              At intervals not exceeding 200 hours time in service.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2030},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing directive. It maintains the original narrow scope covering only periodic replacement of brake master cylinder diaphragms for Piper PA-22 aircraft fitted with specific Scott brake systems. No expansion beyond the original safety maintenance requirement is evident."},"complexity_factors":["Single operative requirement with no sub-paragraphs","No cross-references to other legislative provisions","Only two technical part numbers specified","Simple periodic compliance interval (200 hours time in service)","No definitions section or interpretation provisions"],"plain_english_summary":"This is a mandatory safety instruction (an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority for aircraft owners and mechanics.\n\n**Who it affects:**\nOwners and operators of **Piper PA-22 Tri-Pacer and Colt** aeroplanes fitted with Scott brake master cylinders (part number B711).\n\n**What you must do:**\nReplace the rubber diaphragm in the brake master cylinder with a new one (specifically Scott part B1751 or Piper part 750 384).\n\n**When:**\nAt least once every **200 hours of flight time** (called 'time in service').\n\n**Why it matters:**\nThis prevents brake failure caused by worn or degraded rubber diaphragms, ensuring the aircraft can stop safely."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement","history":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement/history","analysis":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement/analysis","conflicts":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement/conflicts","importantCases":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement/important-cases","documents":"/api/acts/ad-pa-22-15-amdt-1-brake-master-cylinder-diaphragm-replacement/documents"}}