{"id":"F2009L03375","name":"AD/CESSNA 320/20 - Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification - CANCELLED","slug":"ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140957,"registerId":"commonwealth-F2009L03375-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 320 Series Aeroplanes","sectionType":"division","heading":"Cessna 320 Series Aeroplanes","content":"### Cessna 320 Series Aeroplanes\n\n| AD/CESSNA 320/20 | Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification | 10/2009 |\n| ---------------- | ------------------------------------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                      |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                                                      |\n| Background:  | This unique Australian AD specified inspection in accordance with SL No. ME74-17 at intervals not exceeding 100 hours until Service Kit SK 310-91A was installed. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n13 August 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 320/20","sectionType":"part","heading":"AD/CESSNA 320/20","content":"## AD/CESSNA 320/20","sortOrder":1},{"sectionNumber":"Main Landing Gear Aft Trunnion Support S","sectionType":"part","heading":"Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification","content":"## Main Landing Gear Aft Trunnion Support Spar - Inspection and Modification","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1259},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument serves solely to cancel a previous Airworthiness Directive. It does not expand or modify the original scope; rather, it terminates the regulatory requirement entirely effective 24 September 2009."},"complexity_factors":["Single-purpose cancellation instrument with no operative provisions","No defined terms or interpretation section","No conditional logic, cross-references, or exceptions","Extremely brief (under 100 words of substantive content)"],"plain_english_summary":"This document **cancels** a previous aviation safety rule (Airworthiness Directive AD/CESSNA 320/20) that applied to Cessna 320 series aircraft.\n\n**What the old rule required:** Owners and operators had to inspect the main landing gear support structure (specifically the \"aft trunnion support spar\") every 100 hours of flight time. This inspection cycle had to continue until a specific service kit (SK 310-91A) was installed on the aircraft.\n\n**What this means:** As of 24 September 2009, aircraft owners and operators are no longer legally required to perform these specific inspections or install that particular service kit to comply with this directive. The Civil Aviation Safety Authority determined this safety measure was no longer necessary.\n\n**Who is affected:** Owners and operators of Cessna 320 series aeroplanes who were previously subject to the inspection requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled","history":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled/history","analysis":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled/analysis","conflicts":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled/important-cases","documents":"/api/acts/ad-cessna-320-20-main-landing-gear-aft-trunnion-support-spar-inspection-and-modification-cancelled/documents"}}