{"id":"F2006B02088","name":"AD/AC/29 Amdt 2 - Fuel Sump Casting P/N 4630068 - Inspection","slug":"ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41318,"registerId":"commonwealth-F2006B02088-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/29 Amdt 2 - Fuel Sump Casting P/N 4630068 - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 12/1967,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Fuel Sump Casting P/N 4630068 - Inspection,29 Amdt 2\ntitle: Airworthiness Directive - AD/AC/29 Amdt 2 - Fuel Sump Casting P/N 4630068 - Inspection\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/29\n\nAmdt 2\n\n\nFuel Sump Casting P/N 4630068 - Inspection 12/67\n\n \n\nApplicability: All models (except 500A, 500B, 500U, 680T and 1121) with S/Nos. 231 to 1450. Document:              Aero Commander SB No. 82A.\n\nCompliance: Inspect vapour box before each flight and inspect sump casting at intervals of twelve months, until sump is replaced with sump P/N 4630202 in accordance with Aero Commander SB No. 91.\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":2017},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original 1967 directive's scope of ensuring fuel system integrity through inspection requirements. As Amendment 2, it appears to refine compliance details without expanding beyond the original safety purpose of addressing defects in fuel sump casting part number 4630068."},"complexity_factors":["No interpretation section or legislative definitions","Single compliance requirement with only two inspection intervals (pre-flight and 12-monthly)","Applicability limited to specific aircraft models and serial number range 231–1450 with only 5 exclusions","References only two external technical documents (Aero Commander Service Bulletins 82A and 91)","Clear terminating action (replacement with P/N 4630202 ends the inspection requirement)"],"plain_english_summary":"This AD requires owners/operators of certain Twin Commander 500/600/700-series airplanes (specific serial ranges and model exclusions) to perform preflight inspections of the vapour box and annual inspections of the fuel sump casting (p/n 4630068), and to ultimately replace the old sump with the improved part (p/n 4630202) per the manufacturer’s Service Bulletin 91.\n\nIt addresses a known sump-casting defect that can cause fuel leaks or engine failure, providing interim checks until the safer replacement is installed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection","history":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection/history","analysis":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection/analysis","conflicts":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection/conflicts","importantCases":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection/important-cases","documents":"/api/acts/ad-ac-29-amdt-2-fuel-sump-casting-p-n-4630068-inspection/documents"}}