{"id":"F2009L04364","name":"AD/SF340/2 Amdt 1 - Rudder Limiter High Speed Stop","slug":"ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82115,"registerId":"commonwealth-F2009L04364-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"SAAB SF340 Series Aeroplanes","sectionType":"division","heading":"SAAB SF340 Series Aeroplanes","content":"### SAAB SF340 Series Aeroplanes\n\n| AD/SF340/2 Amdt 1 | Rudder Limiter High Speed Stop | 24/2009 |\n| ----------------- | ------------------------------ | ------- |\n\n| Applicability: | All models with S/Nos. 340A-003 to -048.                                                                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with SAAB-Fairchild Service Bulletin SF340-27-018 Rev.1 and SF340-27-032.The use of later approved revisions of these documents is acceptable for compliance with the requirements of this AD.Note: Swedish AD No. 1-006 Rev. A refers.                                                                                                                                                                                  |\n| Compliance:    | Prior to 31 March 2010, unless already accomplished.                                                                                                                                                                                                                                                                                                                                                                                          |\n|                | This Amendment becomes effective on 28 January 2010.                                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | Analysis/tests have demonstrated that it is necessary to reduce the range of travel imposed by the rudder limiter mechanism in the higher speed range to fully comply with certification requirements.This amendment updates the documents required to comply with the latest edition of Swedish AD No. 1-006 Rev. A that introduces a structural clearance check of the rudder limiter hook and a modification contained in SB SF340-27-032. |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n25 November 2009","sortOrder":0},{"sectionNumber":"AD/SF340/2 Amdt 1","sectionType":"part","heading":"AD/SF340/2 Amdt 1","content":"## AD/SF340/2 Amdt 1","sortOrder":1},{"sectionNumber":"Rudder Limiter High Speed Stop","sectionType":"part","heading":"Rudder Limiter High Speed Stop","content":"## Rudder Limiter High Speed Stop","sortOrder":2},{"sectionNumber":"24/2009","sectionType":"part","heading":"24/2009","content":"## 24/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose — ensuring the rudder limiter mechanism meets certification requirements. The amendment simply updates the referenced technical documents to incorporate an additional structural check and modification, without expanding beyond the specific airworthiness issue identified."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined applicability criterion (serial number range)","No nested conditional logic or exceptions","Single compliance pathway with clear deadline","References external technical documents (Service Bulletins) rather than incorporating complex technical specifications directly","No cross-references to other legislation or regulations within the text itself"],"plain_english_summary":"This AD mandates owners/operators of SAAB SF340 aeroplanes (s/n 340A‑003 to 340A‑048) to modify the rudder limiter because testing showed excessive rudder travel at high speed, risking airframe stress or loss of control. Operators must complete the required modifications and checks per SAAB service bulletins SF340‑27‑018 Rev.1 and SF340‑27‑032. The directive took effect 28 Jan 2010 and required completion before 31 Mar 2010 (unless already done)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment updates the previously required documents and actions to match Swedish AD No. 1-006 Rev. A by adding a structural clearance check of the rudder limiter hook and including a modification specified in SB SF340-27-032; it therefore broadens the technical requirements beyond the original AD's stated measures (see Background and Requirement)."},"complexity_factors":["Narrow applicability: applies only to specific serial-number range (S/Nos. 340A-003 to -048) — limits affected population (Applicability).","Dependence on external technical documents: compliance requires following two specific Service Bulletins (SF340-27-018 Rev.1 and SF340-27-032); later approved revisions are acceptable (Requirement).","Technical content: requires both a structural clearance check of the rudder limiter hook and a physical modification to the limiter (Background), which requires certified maintenance capability.","Firm compliance deadline: work must be completed prior to 31 March 2010 unless already done (Compliance), creating scheduling pressure.","Regulatory cross-reference: aligns Australian requirement with Swedish AD No. 1-006 Rev. A (Background), so interpretation depends on a foreign AD and its revisions."],"plain_english_summary":"This airworthiness directive requires operators of SAAB SF340 aeroplanes (serial numbers 340A-003 to -048) to carry out inspections and a modification specified in SAAB‑Fairchild Service Bulletins SF340‑27‑018 Rev.1 and SF340‑27‑032 by 31 March 2010. Mechanically, it reduces the rudder limiter’s allowable travel at high speed and adds a structural clearance check to meet certification requirements. Aircraft operators and maintenance organisations must decide scheduling and pay for the work; compliance affects aircraft availability and maintenance costs."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop","history":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop/history","analysis":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop/analysis","conflicts":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop/conflicts","importantCases":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop/important-cases","documents":"/api/acts/ad-sf340-2-amdt-1-rudder-limiter-high-speed-stop/documents"}}