{"id":"F2005L01055","name":"AD/A320/172 - Main Landing Gear Support Rib 5","slug":"ad-a320-172-main-landing-gear-support-rib-5","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":34644,"registerId":"commonwealth-F2005L01055-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A319, A320 and A321 Ser","sectionType":"division","heading":"Airbus Industrie A319, A320 and A321 Series Aeroplanes","content":"### Airbus Industrie A319, A320 and A321 Series Aeroplanes\n\n| AD/A320/172 | Main Landing Gear Support Rib 5 | 6/2005 |\n| ----------- | ------------------------------- | ------ |\n\n| Applicability: | All Model A319, A320, and A321 aircraft; except aircraft with Airbus Modification 32025 incorporated in production, or Airbus Service Bulletin A320-57-1118 incorporated in service. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the requirements of DGAC AD F-2005-035.Note: Airbus Alert Service Bulletin A320-57A1136, or a later EASA approved revision, refers.                        |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 9 June 2005.                                                                                              |\n|                | This Airworthiness Directive becomes effective on 9 June 2005.                                                                                                                       |\n| Background:    | A report was received of a crack in the forward lug of the right hand main landing gear support rib 5. Such cracking could affect the structural integrity of the main landing gear. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n26 April 2005","sortOrder":0},{"sectionNumber":"AD/A320/172","sectionType":"part","heading":"AD/A320/172","content":"## AD/A320/172","sortOrder":1},{"sectionNumber":"Main Landing Gear Support Rib 5","sectionType":"part","heading":"Main Landing Gear Support Rib 5","content":"## Main Landing Gear Support Rib 5","sortOrder":2},{"sectionNumber":"6/2005","sectionType":"part","heading":"6/2005","content":"## 6/2005","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1643},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains the standard scope of an airworthiness directive - addressing a specific identified safety defect in aircraft structure. It does not expand beyond the original purpose of ensuring safe operation of the affected aircraft models."},"complexity_factors":["Incorporates by reference external technical documents (French DGAC AD F-2005-035 and Airbus Service Bulletin) which contain the actual procedural requirements","Contains two specific applicability exceptions based on prior manufacturing modifications or service bulletins","Uses technical aviation terminology requiring specialized engineering knowledge to interpret (e.g., 'forward lug', 'support rib 5', 'right hand main landing gear')","Requires cross-referencing between the Australian directive, French aviation authority requirements, and manufacturer service bulletins to determine full compliance obligations"],"plain_english_summary":"Australia's airworthiness directive orders urgent inspection and repair of the right-hand main landing gear support rib 5 on Airbus A319/A320/A321 aircraft to address cracking in the forward attachment lug. It applies to all Australian operators except aircraft already modified per Airbus mod 32025 or that have completed ASB A320-57-1118. Operators must follow the DGAC AD and Airbus Alert Service Bulletin A320-57A1136 to mitigate risk of landing gear failure; compliance was required by 9 June 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5","history":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5/history","analysis":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5/analysis","conflicts":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5/conflicts","importantCases":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5/important-cases","documents":"/api/acts/ad-a320-172-main-landing-gear-support-rib-5/documents"}}