{"id":"F2007L00099","name":"AD/A320/198 - Ram Air Turbine Actuator","slug":"ad-a320-198-ram-air-turbine-actuator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":68169,"registerId":"commonwealth-F2007L00099-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","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/A320/198 | Ram Air Turbine Actuator | 2/2007 |\n| ----------- | ------------------------ | ------ |\n\n| Applicability: | Airbus Industrie A319 and A321 model aircraft, not incorporating Airbus Industrie modification 27015 in production or Airbus Industrie Service Bulletin (SB)A320-29-1088 in service.                                                                                                                |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Replace the Ram Air Turbine (RAT) actuator with an improved actuator in accordance with the instructions of Airbus Industrie Service Bulletin A320-29-1088; original issue or later DGAC approved revisions.Note: French DGAC Airworthiness Directive 1999-412-141(B) dated 20 October 1999 refers. |\n| Compliance:    | Unless already accomplished, within 50 hours or one month from the effective date of this Airworthiness Directive, whichever occurs earlier.                                                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 15 February 2007.                                                                                                                                                                                                                                 |\n| Background:    | The Ram Air Turbine (RAT) actuator may jam if the RAT deployment is initiated with the aircraft in negative G conditions. Should the actuator jam under these conditions, the RAT may not be recoverable during flight.                                                                             |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n5 January 2007","sortOrder":0},{"sectionNumber":"AD/A320/198","sectionType":"part","heading":"AD/A320/198","content":"## AD/A320/198","sortOrder":1},{"sectionNumber":"Ram Air Turbine Actuator","sectionType":"part","heading":"Ram Air Turbine Actuator","content":"## Ram Air Turbine Actuator","sortOrder":2},{"sectionNumber":"2/2007","sectionType":"part","heading":"2/2007","content":"## 2/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical failure mode in a defined aircraft population. No scope creep detected."},"complexity_factors":["Single, specific mechanical component targeted (RAT actuator)","Clear applicability criteria based on aircraft model and modification status","Single compliance action with straightforward deadline (50 hours or 1 month)","No nested exceptions or conditional logic — either the aircraft has the modification or it doesn't","References only one external technical document (Airbus Service Bulletin)","Short, self-contained document with minimal cross-referencing"],"plain_english_summary":"Airworthiness Directive requires owners/operators of certain Airbus A319/A321 aircraft without mod 27015 or SB A320‑29‑1088 to replace the Ram Air Turbine (RAT) actuator with an improved unit within 50 flight hours or one month from 15 February 2007. \n\nThe actuator can jam if deployed during negative‑G, preventing the RAT — the emergency windmill that provides electricity and hydraulics — from operating when needed; the mandatory replacement restores that critical backup capability."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope remains a targeted safety correction limited to affected A319/A321 aircraft that have not incorporated the specified modification or service bulletin. The instrument mandates replacement per the Airbus service bulletin and does not broaden applicability beyond the aircraft and conditions identified in the AD or the referenced DGAC material."},"complexity_factors":["Narrow applicability: specific to Airbus A319 and A321 aircraft lacking mod 27015 or SB A320‑29‑1088.","Single prescriptive corrective action: mandatory replacement of the RAT actuator per Airbus SB A320‑29‑1088 (original issue or later DGAC‑approved revisions).","Short, fixed compliance window: within 50 flight hours or one month from the AD effective date.","Reliance on external technical document: implementation requires following the Airbus service bulletin as the procedural authority.","Regulatory provenance: references a related French DGAC airworthiness directive and is issued by CASA via a delegated decision."],"plain_english_summary":"This Airworthiness Directive requires operators of Airbus A319 and A321 aircraft that do not have modification 27015 or service bulletin A320‑29‑1088 applied to replace the Ram Air Turbine (RAT) actuator with an improved unit, following Airbus Service Bulletin A320‑29‑1088, to prevent RAT jamming during negative‑G deployment. Operators must complete the replacement within 50 flight hours or one month, bear the cost of parts and labour, and follow the service‑bulletin instructions; the AD was issued by the CASA delegate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-198-ram-air-turbine-actuator","history":"/api/acts/ad-a320-198-ram-air-turbine-actuator/history","analysis":"/api/acts/ad-a320-198-ram-air-turbine-actuator/analysis","conflicts":"/api/acts/ad-a320-198-ram-air-turbine-actuator/conflicts","importantCases":"/api/acts/ad-a320-198-ram-air-turbine-actuator/important-cases","documents":"/api/acts/ad-a320-198-ram-air-turbine-actuator/documents"}}