{"id":"F2006B01943","name":"AD/A320/55 - Centre Wing, Bracket Between Shroud Box and Fixed Shroud","slug":"ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41165,"registerId":"commonwealth-F2006B01943-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/55 - Centre Wing, Bracket Between Shroud Box and Fixed Shroud","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 9/1995,Aircraft above 5700 kg,Airbus Industrie A319, A320 and A321 Series Aeroplanes,Centre Wing, Bracket Between Shroud Box and Fixed Shroud,55\ntitle: Airworthiness Directive - AD/A320/55 - Centre Wing, Bracket Between Shroud Box and Fixed Shroud\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)  Airbus Industrie A319, A320 and A321 Series Aeroplanes\n\n \n\n# AD/A320/55 Centre Wing, Bracket Between Shroud Box and Fixed Shroud\n\nApplicability: As specified in the Requirement Document.\n\n \n\nRequirement: Action in accordance with Airbus Industrie SB A320-57-1034 Rev. 1.\n\n \n\nNote: DGAC AD 95-100-068(B) refers.\n\n# 9/95\n\n \n\nCompliance: Prior to attaining 17 000 flight cycles, thereafter at the intervals specified in the Requirement Document.\n\n \n\nNote: Full incorporation of Airbus Industrie SB A320-57-1035 terminates this Directive.\n\n \n\nBackground: This Directive is issued to detect and/or prevent any damage related to structural fatigue.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific structural component of specific aircraft models. It has not expanded beyond its original purpose of addressing fatigue in the centre wing bracket."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 substantive requirement referencing an external technical document (Airbus SB A320-57-1034)","No defined terms section — relies entirely on external aerospace terminology","Simple compliance structure: single deadline (17,000 flight cycles) plus recurring intervals","Single termination condition clearly stated","No nested exceptions, conditional logic, or cross-references to other legislation beyond one note about a French aviation authority directive"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of Airbus A319/A320/A321 aircraft to inspect the bracket that links the centre wing shroud box to the fixed shroud for fatigue cracks before 17,000 flight cycles and then at intervals in Airbus Service Bulletin A320-57-1034 Rev.1. It stops recurring inspections once the permanent repair in SB A320-57-1035 is fully embodied. This affects airlines, MROs and lessors operating these types in Australia."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The Directive's scope aligns with its stated purpose: to detect and/or prevent structural fatigue of the centre wing bracket. It prescribes mandatory action via an Airbus service bulletin prior to 17,000 flight cycles and recurring intervals set out in the Requirement Document, with termination when SB A320-57-1035 is incorporated. The text shows no divergence between stated intent and the measures imposed."},"complexity_factors":["Dependency on external technical documents: Airbus SB A320-57-1034 Rev.1 (Requirement Document) for detailed actions and intervals","Applicability not specified in the text itself—relies on the Requirement Document for which aircraft/serials are affected","Recurring compliance intervals are set by the Requirement Document rather than the AD text, increasing operational planning complexity","Termination condition depends on full incorporation of a later service bulletin (A320-57-1035), creating a conditional lifecycle","Technical subject-matter: structural fatigue inspection/repair requires specialised maintenance personnel and records","Cross-reference to foreign authority (DGAC AD 95-100-068(B)) may introduce alignment issues for international operators","Potential operational and cost impacts for operators from inspections, repairs and scheduling around the 17,000 flight-cycle threshold"],"plain_english_summary":"This AD requires operators of Airbus A319/A320/A321 aeroplanes to carry out the actions in Airbus Service Bulletin A320-57-1034 Rev.1 on the centre wing bracket between the shroud box and the fixed shroud before each aircraft reaches 17,000 flight cycles and then at the recurring intervals specified in the Requirement Document. It mechanically mandates inspection and corrective action to detect or prevent structural fatigue.\n\nIt affects aircraft owners/operators who must schedule, perform and pay for the required work to maintain airworthiness; the Directive is terminated once SB A320-57-1035 is fully incorporated."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud","history":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud/history","analysis":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud/analysis","conflicts":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud/conflicts","importantCases":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud/important-cases","documents":"/api/acts/ad-a320-55-centre-wing-bracket-between-shroud-box-and-fixed-shroud/documents"}}