{"id":"F2006B08346","name":"AD/CESSNA 400/60 Amdt 1 - Main Landing Gear Trunnion - Inspection","slug":"ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115753,"registerId":"commonwealth-F2006B08346-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/60 Amdt 1 - Main Landing Gear Trunnion - 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 400/60\n\nAmdt 1\n\n\nMain Landing Gear Trunnion - Inspection 6/80\n\n \n\nApplicability:  All models 402 with S/Nos. 402C0001 to 402C0039; All models 414 with S/Nos. 414A0001 to 414A0235; All models 421 with S/Nos. 421C0001 to 421C0638.\n\n \n\nDocument: Cessna SIL ME 79-11.\n\n \n\nCompliance: On achieving 300 hours time in service and thereafter at intervals not exceeding 50 hours time in service until modified.\n\n \n\nBackground: In service cracking of the existing main landing gear trunnion may occur.\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":1915},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing directive, but the scope remains tightly focused on the original safety purpose: preventing landing gear failure due to trunnion cracking in specific Cessna models. The amendment does not appear to expand the applicability to new aircraft types or introduce unrelated compliance requirements."},"complexity_factors":["Single-page document with no defined terms section","Limited applicability to three specific aircraft models with enumerated serial number ranges","Only one compliance action required (visual/dimensional inspection)","Simple recurring trigger based on flight hours (300 hours, then every 50 hours)","No cross-references to other legislation or regulatory provisions","Plain language background statement explaining the safety risk"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specific Cessna 402, 414, and 421 aircraft (listed serial ranges) to inspect the main landing gear trunnion for cracks. Inspect at 300 hours time-in-service and repeat every 50 hours until a permanent corrective modification is installed. It’s required because undetected trunnion cracks can lead to landing gear collapse during takeoff or landing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection","history":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection/history","analysis":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection/analysis","conflicts":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection/conflicts","importantCases":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection/important-cases","documents":"/api/acts/ad-cessna-400-60-amdt-1-main-landing-gear-trunnion-inspection/documents"}}