{"id":"F2005L03546","name":"AD/B737/252 - Leading Edge Slat Track Fittings","slug":"ad-b737-252-leading-edge-slat-track-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39060,"registerId":"commonwealth-F2005L03546-current","compilationNumber":null,"startDate":"2026-04-01","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/B737/252 | Leading Edge Slat Track Fittings | 13/2005 |\n| ----------- | -------------------------------- | ------- |\n\n| Applicability: | Model 737-100, -200, and -200C series aircraft, line numbers 1 through 1585.                                                                                                                                                                                                                                                                                                               |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2005-20-16Amdt 39-14310.Note: Boeing Special Attention Service Bulletin 737-57-1273 Revision 2 and Boeing Service Bulletin 737-57-1080 Revision 3, or later FAA approved revisions, refer.                                                                                                                                  |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of22 December 2005.                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 22 December 2005.                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The FAA received reports of damage to the lugs of certain inboard attach fittings of the leading edge slat tracks. The actions required by this Directive are intended to prevent a lifted slat, which, if the aircraft performs any non-normal manoeuvre during takeoff or landing at very high angles of attack, could lead to the loss of the slat and reduced control of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 November 2005","sortOrder":0},{"sectionNumber":"AD/B737/252","sectionType":"part","heading":"AD/B737/252","content":"## AD/B737/252","sortOrder":1},{"sectionNumber":"Leading Edge Slat Track Fittings","sectionType":"part","heading":"Leading Edge Slat Track Fittings","content":"## Leading Edge Slat Track Fittings","sortOrder":2},{"sectionNumber":"13/2005","sectionType":"part","heading":"13/2005","content":"## 13/2005","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"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"No expansion of technical or operator scope is indicated in this document. The AD adopts the FAA AD procedures for the specified Boeing 737 models/line numbers and notes a revised effective date of 22 December 2005; applicability remains Model 737-100/200/200C, line numbers 1–1585 (Applicability; Requirement; Compliance)."},"complexity_factors":["References and reliance on an external FAA AD (FAA AD 2005-20-16Amdt 39-14310) and Boeing service bulletins rather than containing full procedures itself (Requirement).","Applicability limited to specific models and narrow line-number range (Model 737-100, -200, -200C; line numbers 1–1585) requiring precise aircraft tracking (Applicability).","Technical nature of work (inspection and possible repair of leading-edge slat track fittings and damaged inboard attach fitting lugs) creates specialised labour, parts and downtime burdens (Background/Requirement).","Permits use of later FAA-approved revisions to the referenced service bulletins, introducing potential version-control and compliance-document uncertainty (Requirement).","Administrative timing (revised effective date of 22 December 2005) and regulatory enforcement by CASA (delegate signature) add scheduling and compliance-monitoring obligations (Compliance; signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 737-100, -200 and -200C (line numbers 1–1585) to follow FAA AD 2005-20-16 and the referenced Boeing service bulletins to inspect and, if needed, repair leading-edge slat track fittings. It aims to prevent slat loss caused by damaged inboard attach fitting lugs during high angle-of-attack manoeuvres. Operators pay for inspections and repairs; the Civil Aviation Safety Authority enforces compliance from 22 December 2005."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a tightly focused, single-purpose scope: addressing a specific structural defect in specific aircraft models. There is no evidence of scope creep — it does exactly what ADs are designed to do (mandate safety fixes for identified airworthiness issues) without expanding into broader operational or regulatory matters."},"complexity_factors":["Very short document (under 300 words)","Only 4 substantive sections: Applicability, Requirement, Compliance, and Background","No defined terms section — relies entirely on external technical references (FAA AD and Boeing service bulletins)","Single compliance date with no conditional deadlines or phased implementation","No nested exceptions or conditional logic — applies straightforwardly to listed aircraft models","Cross-references to external technical documents rather than internal legislative structure"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and repair of leading-edge slat track fittings on early Boeing 737s (line numbers 1–1585), affecting any operators of those aircraft in Australia. It responds to FAA findings that damaged lugs could let a slat lift or detach during takeoff or landing, creating a severe control risk. Operators must follow FAA AD 2005-20-16 and Boeing service bulletins, completed by 22 December 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings","history":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings/history","analysis":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings/analysis","conflicts":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings/conflicts","importantCases":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings/important-cases","documents":"/api/acts/ad-b737-252-leading-edge-slat-track-fittings/documents"}}