{"id":"F2006L00384","name":"AD/A320/191 - Ram Air Turbine - Carbon Blade","slug":"ad-a320-191-ram-air-turbine-carbon-blade","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117015,"registerId":"commonwealth-F2006L00384-current","compilationNumber":null,"startDate":"2026-04-03","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/A320/191 | Ram Air Turbine - Carbon Blade | 3/2006 |\n| ----------- | ------------------------------ | ------ |\n\n| Applicability: | AIRBUS A320 aeroplanes fitted with SUNDSTRAND RAT Part Number (P/N) 762308 installed by AIRBUS modification 27189 in production.AIRBUS A319 and A321 aeroplanes fitted with SUNDSTRAND RAT P/N 762308 installed by AIRBUS modification 25364 in production or AIRBUS Service Bulletin (SB) A320-29-1075 in service.Note 1: Aircraft on which no modification/replacement of the RAT has been performed since embodiment of AIRBUS modification 27014 (installation of the SUNDSTRAND RAT P/N 766352) or 28413 (reinstallation of the DOWTY RAT) in production are not affected by the requirements of this AD. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect the carbon blades of the RAT and carry out any rectification as necessary in accordance with AIRBUS Service Bulletin A320-29-1124 or later DGAC approved revision.Note 2: DGAC AD F-2005-212 EASA approval No. 2005-6438 dated13 December 2005 refers.                                                                                                                                                                                                                                                                                                                                                 |\n| Compliance:    | Within 600 flight hours following the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background:    | During routine maintenance inspections on an A321 aircraft, three chord wise cracks were found on the aft side of one RAT PN 762308 carbon blade.Investigations revealed a disorientation of carbon fibres during blade manufacturing. Such cracks could impair the blade structural integrity.This AD mandates a one time detailed visual inspection of the blades within 600 flight hours.                                                                                                                                                                                                                   |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/A320/191","sectionType":"part","heading":"AD/A320/191","content":"## AD/A320/191","sortOrder":1},{"sectionNumber":"Ram Air Turbine - Carbon Blade","sectionType":"part","heading":"Ram Air Turbine - Carbon Blade","content":"## Ram Air Turbine - Carbon Blade","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific manufacturing defect in a specific RAT model on specific Airbus variants. The applicability section precisely targets the affected fleet without expansion into broader systems or aircraft types."},"complexity_factors":["Single, specific mechanical component targeted (Sundstrand RAT P/N 762308)","Clear applicability table with explicit part numbers and modification references","One-time inspection requirement with straightforward 600 flight hour deadline","Only two exemption conditions (Note 1)","No nested definitions or interpretive provisions","Cross-reference limited to one Airbus Service Bulletin and one French aviation authority document","Total length: approximately 250 words of substantive content"],"plain_english_summary":"This AD requires operators of certain Airbus A319/A320/A321 aircraft with Sundstrand Ram Air Turbine (RAT) part 762308 to inspect the carbon-fibre RAT blades for cracks (per Airbus Service Bulletin A320‑29‑1124) within 600 flight hours of 16 March 2006, and repair or replace defects. Aircraft already modified with alternative RATs under earlier mods are exempt. It prevents possible RAT failure and loss of emergency hydraulic/electrical power."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The instrument adds a new mandatory one‑time inspection and repair requirement for a defined subset of A319/A320/A321 aeroplanes fitted with Sundstrand RAT P/N 762308 (Applicability, Requirement). It narrows the target group by explicitly excluding aircraft with AIRBUS mods 27014 or 28413, thereby changing compliance obligations for operators depending on their aircraft's modification history (Applicability, Note 1; Compliance)."},"complexity_factors":["Technical specificity: identifies a single supplier part (SUNDSTRAND RAT P/N 762308) and links applicability to specific AIRBUS production modifications (Applicability).","Conditional applicability: excludes aircraft on which mods 27014 or 28413 were embodied, creating a need to check production/modification records (Applicability, Note 1).","Prescriptive remedy tied to external document: mandates inspection and rectification in accordance with AIRBUS SB A320‑29‑1124 or later DGAC‑approved revision, requiring access to and reliance on that SB (Requirement).","Compliance timeframe: one‑time action required within 600 flight hours of the AD effective date, imposing a near‑term scheduling and operational burden (Compliance).","\"Rectify as necessary\" creates operational discretion: the extent of repairs is delegated to maintenance actions guided by the SB and approved revisions, which can vary by operator and AME judgement (Requirement).","Regulatory cross‑reference: DGAC AD and EASA approval are referenced, introducing multi‑jurisdictional documentation and approval tracing (Requirement, Note 2).","Failure cause and risk context are technical: manufacturing disorientation of carbon fibres found during maintenance drives the directive, requiring technical inspection methods to detect chord‑wise cracks (Background).","Traceability and record‑checking burden: operators must ascertain whether the affected RAT was installed in production or by the cited service bulletin, increasing administrative steps to determine applicability (Applicability).","Effective date and enforcement: the AD sets a specific effective date and flight‑hour deadline, creating fixed compliance milestones for operators (Compliance, Effective date)."],"plain_english_summary":"This AD requires operators of Airbus A319/A320/A321 aeroplanes fitted with Sundstrand Ram Air Turbine (RAT) P/N 762308 to carry out a one‑time detailed visual inspection of the RAT carbon blades and to repair any defects per AIRBUS Service Bulletin A320‑29‑1124 (or a later DGAC‑approved revision). It applies to aircraft with that RAT fitted by specific Airbus production modifications, excludes aircraft modified by AIRBUS mods 27014 or 28413, must be done within 600 flight hours, and responds to discovered chord‑wise carbon‑fibre cracks that may reduce blade strength."},"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-a320-191-ram-air-turbine-carbon-blade","history":"/api/acts/ad-a320-191-ram-air-turbine-carbon-blade/history","analysis":"/api/acts/ad-a320-191-ram-air-turbine-carbon-blade/analysis","conflicts":"/api/acts/ad-a320-191-ram-air-turbine-carbon-blade/conflicts","importantCases":"/api/acts/ad-a320-191-ram-air-turbine-carbon-blade/important-cases","documents":"/api/acts/ad-a320-191-ram-air-turbine-carbon-blade/documents"}}