{"id":"F2006B08353","name":"AD/CESSNA 400/7 - Turbocharger Air Inlet Duct - Inspection","slug":"ad-cessna-400-7-turbocharger-air-inlet-duct-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115760,"registerId":"commonwealth-F2006B08353-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/7 - Turbocharger Air Inlet Duct - Inspection","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)  Cessna 400 Series Aeroplanes\n\n \n\nAD/CESSNA 400/7 Turbocharger Air Inlet Duct - Inspection 1/69\n\nApplicability: All models 401 and 402 with S/Nos. below 401-0145 and 402-0145.\n\n \n\nRequirement: Visually inspect the fibreglass inlet duct to the turbocharger compressor for signs of cracking and or breakup.\n\n \n\nCompliance: Within 25 hours time in service after 14 February 1969 and there- after at intervals not exceeding 100 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":1442},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope. It addresses a specific safety defect (fibreglass duct deterioration) in specific aircraft models and has not expanded to cover additional systems, aircraft types, or operational requirements beyond this single inspection mandate."},"complexity_factors":["Single, specific technical requirement (visual inspection only)","No defined terms requiring interpretation","No cross-references to other legislation or regulations","Simple binary applicability test (specific model and serial number range)","Clear, fixed compliance intervals without conditional exceptions"],"plain_english_summary":"This is a mandatory aircraft safety rule requiring visual inspections of the turbocharger air inlet duct on specific Cessna twin-engine planes.\n\n**Who it affects**\nOwners and operators of Cessna 401 and 402 model aircraft with serial numbers below 401-0145 and 402-0145 (early production models).\n\n**What it requires**\nYou must visually inspect the fibreglass duct that feeds air into the turbocharger compressor. Look for cracks, breaks, or deterioration in the fibreglass material.\n\n**When to comply**\n- First inspection: Within 25 hours of flying time after the directive takes effect\n- Ongoing inspections: Every 100 hours of flying time thereafter\n\n**Why it matters**\nA cracked or breaking inlet duct can fail in flight, causing the turbocharger to lose pressure or ingest debris. This can lead to engine damage or power loss, posing a serious safety risk during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection","history":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection/history","analysis":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection/analysis","conflicts":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection/conflicts","importantCases":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection/important-cases","documents":"/api/acts/ad-cessna-400-7-turbocharger-air-inlet-duct-inspection/documents"}}