{"id":"F2017L00565","name":"AD/A320/123 Amdt 1 - Ram Air Turbine Actuator","slug":"ad-a320-123-amdt-1-ram-air-turbine-actuator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":96341,"registerId":"commonwealth-F2017L00565-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus A319, A320 and A321 Series Aeropl","sectionType":"part","heading":"Airbus A319, A320 and A321 Series Aeroplanes","content":"# Airbus A319, A320 and A321 Series Aeroplanes\n\n| AD/A320/123 Amdt 1 | Ram Air Turbine Actuator | 11/2017 |\n| ------------------ | ------------------------ | ------- |\n\n| Applicability: | Airbus A319 and A321 series aircraft, all serial numbers, andAirbus A320 series aircraft, all serial numbers incorporating Airbus Modification 27189 (Installation of A319/A321 configuration RAT).except aircraft having received:- Airbus modification 30978 in production, or- Airbus modification 28413 in production, or- Airbus Service Bulletin (SB) A320-29-1098 as in force from time to time in service. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Replace the ram air turbine (RAT) actuator in accordance with Airbus SB A320‑29‑1098 as in force from time to time.Note 1: This AD is based on DGAC AD 2001-236(B)R1.Note 2: The words “as in force from time to time” require compliance with the most recent version of the referenced document.                                                                                                                 |\n| Compliance:    | No later than 31 May 2003.Note 3: Previous compliance with any requirement in AD/A320/123 constitutes compliance with the same requirement in this AD.                                                                                                                                                                                                                                                             |\n|                | This AD commences on 26 May 2017.                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | During an operational test of the RAT it did not deploy. Investigation revealed machining chips from manufacture found in the end cap were jamming the actuator.                                                                                                                                                                                                                                                   |\n\n|     | Amendment 1 is issued to clarify the AD applicability and update the DGAC AD reference to the latest revision. |\n| --- | -------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.jpeg)\n\nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n18 May 2017","sortOrder":0},{"sectionNumber":"AD/A320/123 Amdt 1","sectionType":"part","heading":"AD/A320/123 Amdt 1","content":"## AD/A320/123 Amdt 1","sortOrder":1},{"sectionNumber":"Ram Air Turbine Actuator","sectionType":"part","heading":"Ram Air Turbine Actuator","content":"## Ram Air Turbine Actuator","sortOrder":2},{"sectionNumber":"11/2017","sectionType":"part","heading":"11/2017","content":"## 11/2017","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose — correcting a specific mechanical defect in the RAT actuator on specific Airbus models. The 2017 amendment does not expand the scope; it merely clarifies applicability language and updates a cross-reference to the French authority's directive. The core safety issue (machining chips in the actuator) and the required remedy (actuator replacement) remain unchanged from the original 2003 directive."},"complexity_factors":["Multiple nested applicability conditions with exceptions to exceptions (applies to A320 series BUT ONLY those with Mod 27189, EXCEPT those with Mod 30978, Mod 28413, or SB A320-29-1098)","Cross-reference to external technical document (Airbus Service Bulletin A320-29-1098) with 'as in force from time to time' clause creating dynamic compliance obligations","Reference to foreign regulatory instrument (DGAC AD 2001-236(B)R1) requiring awareness of French aviation law","Retroactive compliance recognition (Note 3 regarding previous compliance with earlier version)","Technical aviation terminology requiring specialized knowledge (ram air turbine, actuator, modification numbers, service bulletins)"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacement of a potentially jammed ram air turbine (RAT) actuator on certain Airbus A319/A320/A321 jets to prevent failure of emergency electrical and hydraulic power caused by manufacturing metal chips. It applies to A319/A321 aircraft and A320s with the specified Mod 27189, excluding aircraft already modified per listed fixes.\n\nThe amendment clarifies affected aircraft and updates the referenced French authority directive; the compliance deadline was 31 May 2003."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies the AD's applicability wording and updates the referenced DGAC AD to its latest revision. The required action (replacement of the RAT actuator per Airbus SB A320‑29‑1098) and the set of affected aircraft remain the same in substance; the amendment modifies wording and references without expanding or narrowing the stated obligations (Amendment)."},"complexity_factors":["Conditional applicability based on multiple modification states (Mod 27189 required; Mods 30978 or 28413 create exclusions) (Applicability).","Mandatory compliance with an external Airbus Service Bulletin “as in force from time to time” imposes an ongoing obligation to track SB revisions (Requirement; Note 2).","Cross-reference to a foreign airworthiness directive (DGAC AD) updated to a later revision adds a layer of external-document tracking (Amendment).","Administrative quirk: stated compliance deadline (31 May 2003) predates the AD commencement date (26 May 2017), creating potential implementation or record‑keeping confusion (Compliance).","A brief technical root cause (machining chips jamming the actuator) is given, but the AD delegates the specific remedial work to the SB rather than prescribing technical steps, concentrating technical discretion in the SB (Background; Requirement).","Note that prior compliance with the previous AD satisfies this AD for the same requirement, which affects how operators demonstrate compliance (Compliance; Note 3)."],"plain_english_summary":"This airworthiness directive requires operators of Airbus A319/A320/A321 aeroplanes fitted with the A319/A321‑configuration ram air turbine (RAT) (Mod 27189) to replace the RAT actuator following Airbus Service Bulletin A320‑29‑1098 (Requirement; Applicability). Aircraft incorporating later factory modifications (Mods 30978 or 28413) or already compliant with the service bulletin are excluded. Operators must complete the replacement by 31 May 2003 and keep to the most recent SB revision (Compliance; Amendment)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator","history":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator/history","analysis":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator/analysis","conflicts":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator/conflicts","importantCases":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator/important-cases","documents":"/api/acts/ad-a320-123-amdt-1-ram-air-turbine-actuator/documents"}}