{"id":"F2009L04366","name":"AD/SF340/16 Amdt 1 - AC Generator P/No. 31342-001","slug":"ad-sf340-16-amdt-1-ac-generator-p-no-31342-001","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82117,"registerId":"commonwealth-F2009L04366-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/SF340/16 Amdt 1 | AC Generator P/No. 31342-001 | 24/2009 |\n| ------------------ | ---------------------------- | ------- |\n\n| Applicability: | All SAAB SF340A and SF340B aircraft with AC generators P/No. 31342-001 NOT modified to “Mod D” standard.                                                                                                                                                                                                    |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Remove from service all generators P/No. 31342-001 NOT modified to “Mod D” standard in accordance with SAAB-Scania AB Service Bulletin (SB) SF340-24-016.The use of later approved revisions of this document is acceptable for compliance with the requirements of this AD.Note: Swedish AD 1-033A refers. |\n| Compliance:    | Prior to 29 April 2010, unless already accomplished.                                                                                                                                                                                                                                                        |\n|                | This Amendment becomes effective on 25 December 2009.                                                                                                                                                                                                                                                       |\n| Background:    | The subject generators not modified to “Mod D” status have shown an unacceptable failure rate.This amendment updates the revision status of the applicable Swedish AD and includes the SAAB 340B in the applicability.The original issue of this Directive became effective on 10 August 1989.              |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n25 November 2009","sortOrder":0},{"sectionNumber":"AD/SF340/16 Amdt 1","sectionType":"part","heading":"AD/SF340/16 Amdt 1","content":"## AD/SF340/16 Amdt 1","sortOrder":1},{"sectionNumber":"AC Generator P/No. 31342-001","sectionType":"part","heading":"AC Generator P/No. 31342-001","content":"## AC Generator P/No. 31342-001","sortOrder":2},{"sectionNumber":"24/2009","sectionType":"part","heading":"24/2009","content":"## 24/2009","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original 1989 directive applied only to SAAB 340A aircraft. This 2009 amendment expands scope to include the SAAB 340B variant, representing a significant expansion of affected fleet. However, this expansion is consistent with the original safety purpose (addressing the same defective generator part across both aircraft variants)."},"complexity_factors":["Single, specific technical requirement (remove specific part)","Only one defined term of note ('Mod D' standard, referenced but not defined in text)","No nested conditional logic or cross-referencing legislation","Clear applicability table with unambiguous criteria","Single compliance deadline with straightforward exception ('unless already accomplished')","Length: approximately 200 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific SAAB SF340 aircraft to replace or modify certain AC generators before a deadline.\n\n**What it does:**\n- **Targets:** SAAB SF340A and SF340B aircraft fitted with AC generators bearing part number 31342-001 that have **not** been upgraded to \"Mod D\" standard.\n- **Requires:** Removal of these generators from service, following the instructions in SAAB Service Bulletin SF340-24-016.\n- **Deadline:** Before 29 April 2010 (unless already done).\n\n**Why it matters:**\nThese particular generators have an unacceptably high failure rate, creating safety risks. This directive prevents potential electrical system failures in flight.\n\n**What's new in this version:**\nThis amendment expands the original 1989 directive to include the SAAB 340B model (not just the 340A), and updates references to the Swedish aviation authority's equivalent directive."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The amendment broadened the AD's scope by explicitly including SAAB 340B aircraft in applicability and by updating the revision status of the referenced Swedish AD and service information, thereby increasing the set of aircraft and operators required to comply (Applicability; Background). The original Directive dates back to 10 August 1989; this amendment became effective 25 December 2009 and sets the compliance deadline of 29 April 2010 (Background; Compliance)."},"complexity_factors":["Narrow, specific applicability (only SAAB SF340A/B with AC generator P/No. 31342-001 not modified to 'Mod D') (Applicability).","Single, mandatory action: remove affected generators from service (Requirement).","Fixed compliance deadline (Prior to 29 April 2010) imposes a clear time pressure on operators (Compliance).","Compliance method tied to a specific service bulletin (SAAB SB SF340-24-016) but allows later approved revisions, adding limited procedural flexibility (Requirement).","Cross-reference to Swedish AD 1-033A and updated revision status creates reliance on foreign airworthiness material (Requirement/Background).","Administrative details (effective dates, amendment history) are explicit and narrow, reducing interpretive uncertainty (Background/Compliance)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of SAAB SF340A and SF340B aeroplanes to remove AC generators part number 31342-001 that have not been modified to “Mod D,” using SAAB Service Bulletin SF340-24-016 for compliance. The removal must be done by 29 April 2010; the rule imposes replacement/maintenance costs and temporary aircraft downtime on operators and follows an updated Swedish AD after reported high failure rates."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001","history":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001/history","analysis":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001/analysis","conflicts":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001/conflicts","importantCases":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001/important-cases","documents":"/api/acts/ad-sf340-16-amdt-1-ac-generator-p-no-31342-001/documents"}}