{"id":"F2008L01634","name":"AD/ERJ-190/9 - Wing Lower Skin Stringers","slug":"ad-erj-190-9-wing-lower-skin-stringers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73884,"registerId":"commonwealth-F2008L01634-current","compilationNumber":null,"startDate":"2026-04-02","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-190/9 | Wing Lower Skin Stringers | 6/2008 |\n| ------------ | ------------------------- | ------ |\n\n| Applicability: | Model ERJ-190 aircraft, serial numbers 19000004, 19000006 through 19000028, and 19000030 through 19000039.                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of ANAC AD 2008-01-02 Amdt39-1228.Note: Embraer Service Bulletin No. 190-57-0005 Revision 1, or later ANAC approved revision, refers.                                                            |\n| Compliance:    | Before the accumulation of 5,000 flight cycles.                                                                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 5 June 2008.                                                                                                                                                                              |\n| Background:    | During aircraft structural fatigue tests, cracks were detected in the wing lower skin stringers between ribs 7 and 10 on both wings. Undetected fatigue cracking could result in fuel leakage and reduced structural integrity of the wing. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n16 April 2008","sortOrder":0},{"sectionNumber":"AD/ERJ-190/9","sectionType":"part","heading":"AD/ERJ-190/9","content":"## AD/ERJ-190/9","sortOrder":1},{"sectionNumber":"Wing Lower Skin Stringers","sectionType":"part","heading":"Wing Lower Skin Stringers","content":"## Wing Lower Skin Stringers","sortOrder":2},{"sectionNumber":"6/2008","sectionType":"part","heading":"6/2008","content":"## 6/2008","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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive does not expand or narrow scope beyond its stated terms: it applies only to the listed ERJ‑190 serial numbers and requires action per the referenced ANAC AD/Embraer service bulletin before 5,000 flight cycles. No additional categories of aircraft or measures are introduced in the text supplied."},"complexity_factors":["Narrow applicability by specific serial numbers increases administrative filtering to determine affected aircraft (Applicability).","Mandates compliance with an external ANAC airworthiness directive and an Embraer service bulletin, creating dependence on external documents for technical steps (Requirement).","A firm compliance deadline tied to flight cycles (before 5,000 flight cycles) affects maintenance planning and fleet utilisation (Compliance).","Safety‑critical structural work may require specialised inspections/repairs and certified personnel, raising operational cost and logistics burdens (Background + Requirement).","Directive is brief and delegates technical detail to referenced documents, which increases interpretive work for operators and maintenance organisations (Requirement/Note).","Enforceability via CASA (delegate signature and effective date) gives the AD immediate regulatory effect, so timely action is required (effective date/Delegate)."],"plain_english_summary":"Requires operators of specified Embraer ERJ‑190 airframes (listed serial numbers) to perform the inspections or repairs described in ANAC AD 2008‑01‑02 Amdt39‑1228 (and the referenced Embraer Service Bulletin) to address fatigue cracking in wing lower skin stringers. Work must be done before the aeroplane reaches 5,000 flight cycles. Operators pay for and schedule the inspections/repairs; the Civil Aviation Safety Authority gives legal effect to the directive and compliance may require grounding or altered maintenance timing."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific structural defect in specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly understood (flight cycles)","No cross-references to other legislation beyond a single external technical reference (ANAC AD and Embraer SB)","Single compliance condition (before 5,000 flight cycles)","No nested exceptions or conditional logic","Straightforward applicability table with specific serial numbers"],"plain_english_summary":"This AD orders operators of specific Embraer ERJ‑190 serials (19000004, 19000006–19000028, 19000030–19000039) to inspect and, if needed, repair or replace cracked wing lower-skin stringers between ribs 7–10. \n\nAction must follow ANAC AD 2008‑01‑02 and Embraer Service Bulletin 190‑57‑0005 Rev 1, and be done before 5,000 flight cycles (or immediately if already beyond) to prevent fuel leaks, loss of wing strength, and potential catastrophic failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers","history":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers/history","analysis":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers/analysis","conflicts":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers/conflicts","importantCases":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers/important-cases","documents":"/api/acts/ad-erj-190-9-wing-lower-skin-stringers/documents"}}