{"id":"F2006B05806","name":"AD/PA-32/12 - Brake Disc - Replacement","slug":"ad-pa-32-12-brake-disc-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135739,"registerId":"commonwealth-F2006B05806-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-32/12 - Brake Disc - 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-32 (Cherokee Six) Series Aeroplanes\n\n \n\nAD/PA-32/12 Brake Disc - Replacement 7/68\n\nApplicability: All model PA-32 with S/Nos. 32-1 to 32-623. Document:  Piper SB No. 233.\n\nCompliance: Before 1 October 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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2232},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This remains a pinpoint safety intervention addressing a specific mechanical defect in a limited production run of aircraft. It has not expanded beyond its original purpose of preventing brake disc failure in early PA-32 models."},"complexity_factors":["Single, unambiguous compliance action (replace brake discs)","Clear-cut applicability criteria (specific model and serial number range only)","Fixed deadline with no conditional triggers, exceptions, or alternative compliance methods","No defined terms or interpretation sections","Minimal cross-referencing (only to the manufacturer's service bulletin for technical details)"],"plain_english_summary":"**What this does:** This Airworthiness Directive (AD) orders owners of specific Piper Cherokee Six aircraft to replace their brake discs before 1 October 1968. It applies only to planes with serial numbers 32-1 through 32-623.\n\n**Who it affects:** Owners and operators of early-model Piper PA-32 Cherokee Six aeroplanes within that serial number range.\n\n**Why it matters:** Defective brake discs can crack or fail during landing or taxiing, potentially causing runway overruns or loss of steering control. The directive references Piper Service Bulletin No. 233 for the technical specifications of the replacement parts.\n\n**The bottom line:** If your aircraft is on the list, you must fit new brake discs by the deadline or the aircraft cannot legally fly. It's a blunt, non-negotiable safety command with no loopholes or extensions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-32-12-brake-disc-replacement","history":"/api/acts/ad-pa-32-12-brake-disc-replacement/history","analysis":"/api/acts/ad-pa-32-12-brake-disc-replacement/analysis","conflicts":"/api/acts/ad-pa-32-12-brake-disc-replacement/conflicts","importantCases":"/api/acts/ad-pa-32-12-brake-disc-replacement/important-cases","documents":"/api/acts/ad-pa-32-12-brake-disc-replacement/documents"}}