{"id":"F2008L04607","name":"AD/ERJ-190/18 - Ram Air Turbine Machined Support","slug":"ad-erj-190-18-ram-air-turbine-machined-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120954,"registerId":"commonwealth-F2008L04607-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer ERJ-190 Series Aeroplanes","sectionType":"division","heading":"Embraer ERJ-190 Series Aeroplanes","content":"### Embraer ERJ-190 Series Aeroplanes\n\n| AD/ERJ-190/18 | Ram Air Turbine Machined Support | 2/2009 DM |\n| ------------- | -------------------------------- | --------- |\n\n| Applicability: | Model ERJ 190 aircraft, serial numbers 19000002, 19000004, and 19000006 through 19000152.                                                                                            |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the requirements of ANAC AD 2008-10-06 Amdt39-1249.Note: Embraer Service Bulletin No. 190-53-0027 original issue, or later ANAC approved revision, refers. |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of15 January 2009.                                                                                           |\n|                | This Airworthiness Directive becomes effective on 15 January 2009.                                                                                                                   |\n| Background:    | The manufacturer has determined that cracks may develop in the ram air turbine (RAT) machined support, due to the downlock pin not being withdrawn during the retraction of the RAT. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n5 December 2008","sortOrder":0},{"sectionNumber":"AD/ERJ-190/18","sectionType":"part","heading":"AD/ERJ-190/18","content":"## AD/ERJ-190/18","sortOrder":1},{"sectionNumber":"Ram Air Turbine Machined Support","sectionType":"part","heading":"Ram Air Turbine Machined Support","content":"## Ram Air Turbine Machined Support","sortOrder":2},{"sectionNumber":"2/2009 DM","sectionType":"part","heading":"2/2009 DM","content":"## 2/2009 DM","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical defect in a specific aircraft component. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined elements: applicability (specific serial numbers), requirement (reference to external document), and compliance date","Single technical issue with straightforward remedy","No nested conditions or exceptions — either your aircraft is on the list or it isn't","Heavy reliance on external technical documents (Embraer Service Bulletin and ANAC AD) rather than detailed instructions within the directive itself"],"plain_english_summary":"This CASA airworthiness directive mandates inspections and repairs to the ram air turbine (RAT) support on certain Embraer ERJ-190s after cracks were found caused by incomplete downlock-pin withdrawal. Owners/operators of specified serial-numbered aircraft must carry out the repairs per Embraer Service Bulletin 190-53-0027 (and ANAC AD 2008-10-06). It took effect 15 January 2009 to prevent RAT failure and loss of emergency power."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No substantive change to which aircraft are affected or to the mandated actions. The instrument revises only the effective date to 15 January 2009; the Requirement remains to follow ANAC AD 2008‑10‑06 Amdt39‑1249 and the referenced Embraer Service Bulletin (Compliance)."},"complexity_factors":["Narrow applicability: limited to specific ERJ‑190 serial numbers (Applicability).","Cross‑reference to foreign authority AD and manufacturer service bulletin creates dependency on ANAC and SB revisions (Requirement; Note).","Clear single‑issue technical risk (RAT machined support cracking) reduces legal ambiguity (Background).","Compliance mechanics are straightforward (inspect/repair), but practical complexity arises from scheduling and repair costs for operators (Requirement; Compliance).","Regulatory instrument issued by CASA delegate with a fixed effective date; limited administrative discretion (signature/issue details)."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Embraer ERJ‑190 aeroplanes (serial numbers 19000002, 19000004, and 19000006–19000152) to carry out the actions set out in ANAC AD 2008‑10‑06 Amdt39‑1249 and Embraer Service Bulletin 190‑53‑0027 (or a later ANAC‑approved revision). It becomes effective 15 January 2009. \n\nCASA issued the AD after the manufacturer found a risk that the ram air turbine (RAT) machined support can crack if the downlock pin is not withdrawn during RAT retraction. Operators are responsible for inspections/repairs and for meeting the AD’s timing and procedural requirements (Applicability; Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support","history":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support/history","analysis":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support/analysis","conflicts":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support/conflicts","importantCases":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support/important-cases","documents":"/api/acts/ad-erj-190-18-ram-air-turbine-machined-support/documents"}}