{"id":"F2009L04404","name":"AD/SF340/5 Amdt 1 - Installation of Tail De-Icer Valve Heater Blanket","slug":"ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82183,"registerId":"commonwealth-F2009L04404-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/SF340/5 Amdt 1 | Installation of Tail De-IcerValve Heater Blanket | 24/2009 |\n| ----------------- | ------------------------------------------------ | ------- |\n\n| Applicability: | All models with serial No’s 340-003 to 041, 044 and 047                                                                                                                                                                                                   |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with SAAB Fairchild Service Bulletin (SB) SF340-30-015 Rev.1.The use of later approved revisions of the Requirement document is acceptable for compliance with the requirements of this AD.Note: Swedish AD No. 1-010 Rev. A refers. |\n| Compliance:    | If not already accomplished, prior to 30 March 2010.                                                                                                                                                                                                      |\n|                | This Amendment becomes effective on 17 December 2009.                                                                                                                                                                                                     |\n| Background:    | Service experience has shown that the tail de-icer distribution valve is susceptible to freezing due to moisture ingress.This amendment updates the revision status of both the requirement document and the applicable Swedish AD.                       |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n30 November 2009","sortOrder":0},{"sectionNumber":"AD/SF340/5 Amdt 1","sectionType":"part","heading":"AD/SF340/5 Amdt 1","content":"## AD/SF340/5 Amdt 1","sortOrder":1},{"sectionNumber":"Installation of Tail De-IcerValve Heater","sectionType":"part","heading":"Installation of Tail De-IcerValve Heater Blanket","content":"## Installation of Tail De-Icer  \nValve Heater Blanket","sortOrder":2},{"sectionNumber":"24/2009","sectionType":"part","heading":"24/2009","content":"## 24/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment updates the revision status of the required service bulletin and the referenced Swedish AD but does not expand applicability or change the substantive requirement to install the tail de‑icer valve heater blanket (Requirement; Background)."},"complexity_factors":["Limited applicability by serial number requires fleet-level record checks (Applicability).","Mandated compliance relies on an external manufacturer Service Bulletin and permits later approved revisions, creating dependency on SB access and revision control (Requirement).","Fixed compliance deadline imposes scheduling and maintenance-planning burdens on operators and MROs (Compliance).","Technical installation likely requires certified maintenance personnel, parts procurement and shop hours (Requirement; Background).","Cross-reference to a foreign (Swedish) AD requires operators to track international regulatory material (Background).","Regulator-issued amendment effective date requires administrative updates to operator compliance records (Compliance)."],"plain_english_summary":"Mandates installation of a heater blanket on the tail de‑icer valve for Saab SF340 aeroplanes serials 340‑003 to 041, 044 and 047, as specified in SAAB Service Bulletin SF340‑30‑015 Rev.1 (Applicability; Requirement). Operators must complete the work by 30 March 2010 and bear the costs of parts and maintenance; compliance follows the manufacturer’s bulletin and references a Swedish AD (Compliance; Requirement; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical safety directive focused on a specific mechanical modification to a specific aircraft type. It has not expanded beyond its original purpose of addressing the freezing valve issue."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement (install heater blanket per service bulletin)","Single applicability criterion (specific serial number range)","Single compliance deadline with straightforward exception ('if not already accomplished')","No defined terms section","No cross-references to other legislation or complex conditional logic","Background is purely explanatory, not creating additional legal obligations"],"plain_english_summary":"Owners and operators of SAAB SF340 aeroplanes (s/n 340‑003 to 041, 044, 047) must install a heater blanket around the tail de‑icer distribution valve to prevent moisture ingress and valve freezing.  \n\nWork must follow SAAB Service Bulletin SF340‑30‑015 Rev 1 (or later approved) and be completed before 30 March 2010 if not already done. This mandatory AD addresses a real‑world freezing fault that can impair the tail de‑icing system and create a serious flight‑safety risk in icing conditions."},"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-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket","history":"/api/acts/ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket/history","analysis":"/api/acts/ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket/analysis","conflicts":"/api/acts/ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket/conflicts","importantCases":"/api/acts/ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket/important-cases","documents":"/api/acts/ad-sf340-5-amdt-1-installation-of-tail-de-icer-valve-heater-blanket/documents"}}