{"id":"F2009L00984","name":"AD/B737/353 - Stringer Tie Clips","slug":"ad-b737-353-stringer-tie-clips","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78584,"registerId":"commonwealth-F2009L00984-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/353 | Stringer Tie Clips | 5/2009 DM |\n| ----------- | ------------------ | --------- |\n\n| Applicability: | All Boeing Model 737-100, -200, -200C, -300, -400 and -500 series aircraft, as identified in Boeing special attention service bulletin 737-53-1268 dated25 August 2006.                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2009-04-15 Amdt 39-15821.Note: Boeing special attention service bulletin 737-53-1268, dated 25 August 2006, or later FAA approved revision, refers.Corrective actions (repairs or repeat inspections) that are approved on an FAA form 8100-9 and approved by the Manager, Seattle Aircraft Certification Office or delegate, as an Alternative Method of Compliance (AMOC) to the requirements of FAA AD 2009-04-15, or later revision, may be carried out without the need to obtain an exclusion from CASA from this Directive. |\n| Compliance:    | As specified in the requirement document.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n|                | This Airworthiness Directive becomes effective on 2 April 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background:    | This AD results from a report of several cracked stringer tie clips. The AD is issued to detect and correct multiple adjacent cracked stringer tie clips and damaged skin and frames, which could lead to the skin and frame structure developing cracks, with subsequent structural failure and decompression.                                                                                                                                                                                                                                                                                   |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n10 March 2009","sortOrder":0},{"sectionNumber":"AD/B737/353","sectionType":"part","heading":"AD/B737/353","content":"## AD/B737/353","sortOrder":1},{"sectionNumber":"Stringer Tie Clips","sectionType":"part","heading":"Stringer Tie Clips","content":"## Stringer Tie Clips","sortOrder":2},{"sectionNumber":"5/2009 DM","sectionType":"part","heading":"5/2009 DM","content":"## 5/2009 DM","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":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a focused, single-issue scope (stringer tie clip cracks on specific Boeing 737 models). It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 1 defined term implicitly used (AMOC — explained in note)","Heavy reliance on external documents: references FAA AD 2009-04-15 and Boeing Service Bulletin 737-53-1268 without reproducing their contents","Simple conditional logic: one exception pathway for FAA-approved alternative compliance methods","No nested exceptions or complex cross-referencing within the document itself"],"plain_english_summary":"This AD requires operators of Boeing 737-100/200/200C/300/400/500 aircraft in Australia to inspect and repair cracked stringer tie clips that can lead to fuselage skin/frame damage and decompression. Compliance follows FAA AD 2009-04-15 and Boeing Service Bulletin 737-53-1268; FAA-approved alternate methods (AMOCs) are acceptable. The directive is mandatory and became effective 2 April 2009."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive adopts the requirements of FAA AD 2009-04-15 for the same set of Boeing 737 models and does not expand or narrow applicability. It clarifies that FAA-approved corrective actions submitted on FAA form 8100-9 and approved by the Seattle Aircraft Certification Office (or delegate) are acceptable without a separate CASA exclusion (Requirement Note)."},"complexity_factors":["Cross-reference to an external FAA AD (Requirement) — operators must obtain and follow FAA AD 2009-04-15 rather than relying solely on this Directive.","Dependency on a manufacturer's service bulletin (Applicability) — the Boeing SB 737-53-1268 is the maintenance reference.","Approval path for alternative methods of compliance (AMOC) requires FAA form 8100-9 and approval by the Manager, Seattle Aircraft Certification Office or delegate (Requirement Note), introducing a foreign-approval workflow.","Safety-critical inspections and corrective actions (Background) — work may include repairs or repeat inspections affecting structural integrity.","Broad fleet coverage (Applicability) — multiple 737 series are captured, increasing operational impact across operators.","Compliance timing and enforcement delegated to specified documents (Compliance; Effective date) rather than enumerated in the Directive itself."],"plain_english_summary":"This Airworthiness Directive requires operators of certain Boeing 737 series aeroplanes to carry out inspections and any needed repairs by following FAA AD 2009-04-15 and Boeing Special Attention Service Bulletin 737-53-1268. It applies to 737-100, -200, -200C, -300, -400 and -500 series aircraft and is intended to detect and correct cracked stringer tie clips and related skin/frame damage that could lead to structural failure and decompression."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-353-stringer-tie-clips","history":"/api/acts/ad-b737-353-stringer-tie-clips/history","analysis":"/api/acts/ad-b737-353-stringer-tie-clips/analysis","conflicts":"/api/acts/ad-b737-353-stringer-tie-clips/conflicts","importantCases":"/api/acts/ad-b737-353-stringer-tie-clips/important-cases","documents":"/api/acts/ad-b737-353-stringer-tie-clips/documents"}}