{"id":"F2006B05469","name":"AD/PA-23/43 Amdt 1 - Cleveland Wheel/Brake Assembly - Inspection and Modification","slug":"ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46254,"registerId":"commonwealth-F2006B05469-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/43 Amdt 1 - Cleveland Wheel/Brake Assembly - Inspection and Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-23 (Apache and Aztec) Series Aeroplanes\n\nAD/PA-23/43\n\nAmdt 1\n\n  \n\nCleveland Wheel/Brake Assembly \\- Inspection and Modification\n\n  \n6/71\n\nApplicability: All models fitted with 3080C Cleveland wheel/brake assemblies.\n\nRequirement: 1. Remove brake disc assembly P/N 164-32 from the wheel and inspect the weld which attaches the disc to the cup using a 10X magnifying glass. If any cracks or other obvious defects are found replace the disc assembly as indicated in para. 3.\n\n    2. Replace brake disc P/N 164-32 with a one-piece brake disc P/N 164-32F in accordance with Cleveland SB No. ESB 7000-2 Rev(A) 251-2 dated 15 January 1971.\n\n    3. If a disc P/N 164-32F is not available replace with a disc P/N 164-32 manufactured after 23 May 1969.\n\nCompliance: For para. 1 - Within 100 hours time in service after 30 June 1971 and thereafter at intervals not exceeding 100 hours time in service until modified in accordance with para. 2.\n\nFor para. 2 \\- At next brake overhaul or brake disc replacement.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1942},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of ensuring airworthiness of Cleveland brake assemblies on Piper PA-23 aircraft. As Amendment 1 to an existing directive, it appears to clarify or update technical requirements without expanding the regulatory reach beyond aviation safety maintenance."},"complexity_factors":["Specific manufacturer part numbers requiring cross-referencing (P/N 164-32 vs 164-32F)","Reference to external technical service bulletin (Cleveland SB ESB 7000-2)","Conditional compliance path dependent on parts availability (alternative replacement option)","Technical inspection standard requiring specific magnification (10X magnifying glass)","Dual compliance timelines (repetitive inspections vs one-time replacement)"],"plain_english_summary":"This directive requires owners/operators of Piper PA-23 Apache and Aztec aircraft with 3080C Cleveland wheel/brake assemblies to inspect brake disc part 164-32 for weld defects and replace cracked discs to prevent brake failure. Defective discs must be replaced with the improved one-piece 164-32F; 164-32 may be used only if manufactured after 23 May 1969.\n\nInspections are mandated every 100 flight hours until replacement, and replacement is required at the next overhaul or disc change to ensure landing and taxi safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification","history":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification/history","analysis":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification/important-cases","documents":"/api/acts/ad-pa-23-43-amdt-1-cleveland-wheel-brake-assembly-inspection-and-modification/documents"}}