{"id":"F2006B08199","name":"AD/CESSNA 320/20 - Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification","slug":"ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115408,"registerId":"commonwealth-F2006B08199-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/20 - Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification","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 320 Series Aeroplanes\n\n \n\nAD/CESSNA 320/20 Main Landing Gear Aft Trunnion Support\n\nSpar - Inspection and Modification\n\n\n11/74\n\n \n\nApplicability: All models with S/Nos. 320-0001 to 320D0130, except those with Cessna Service Kit SK 310-91A fitted.\n\n \n\nDocument: Cessna SL ME74-17.\n\n \n\nCompliance: Inspect within 100 hours time in service after 31 December 1974 and thereafter at intervals not exceeding 100 hours time in service until modified.\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":1542},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains narrowly focused on its original purpose: mandating repetitive inspection of a specific landing gear component on specific aircraft models until modification."},"complexity_factors":["Single, specific maintenance task with no sub-conditions","No defined terms requiring interpretation","No cross-references to other legislative provisions","Clear, unambiguous applicability based on serial numbers","Simple recurring compliance interval (100 hours)"],"plain_english_summary":"**What this is:** A mandatory safety inspection requirement for specific Cessna 320 aircraft.\n\n**Who it affects:** Owners and operators of Cessna 320 series planes with serial numbers between 320-0001 and 320D0130, unless the aircraft has already been fitted with Cessna Service Kit SK 310-91A.\n\n**What you must do:**\n- **Inspect** the **main landing gear aft trunnion support spar** (the structural beam that helps hold the main wheels in place) within 100 flight hours after 31 December 1974.\n- **Repeat** this inspection every 100 flight hours thereafter.\n- **Continue** these inspections until the aircraft is modified (presumably with the service kit mentioned above).\n\n**Why it matters:** This directive addresses potential structural weakness or cracking in a critical component that supports the aircraft's landing gear. Failure of this part could lead to landing gear collapse."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification","history":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification/documents"}}