{"id":"F2006B07027","name":"AD/SF340/96 - DC Starter Generator","slug":"ad-sf340-96-dc-starter-generator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48719,"registerId":"commonwealth-F2006B07027-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nSAAB SF340 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/SF340/96 DC Starter Generator 10/2004","sectionType":"part","heading":"AD/SF340/96 DC Starter Generator 10/2004","content":"# AD/SF340/96 DC Starter Generator 10/2004\n\nApplicability: Saab SF340A aeroplanes with serial numbers (S/N) SF340A-004 through \\-159 and Saab 340B aeroplanes S/N 340B-160 through -367 without Saab Aircraft Service Bulletin (SB) 340-24-026 (Mod 2533) incorporated.\n\nNote 1: Modification 2533 introduces Generator Control Unit part number 51539- 007B.\n\nRequirement: Generators overhauled in accordance with MRB task 243104 \\- Carry out repetitive inspections of the starter generator brushes in accordance with Saab Aircraft SB 340-24-035.\n\nGenerators overhauled in accordance with MRB Task 243103 or with brush replacement in accordance with MRB Task 243101 are not affected by this Directive.\n\nNote 2: LFV AD 1-196 R1 refers.\n\nCompliance: Generators with less than 800 hours time in service (TIS) at the effective date of this Directive \\- Within 600 to 800 hours TIS after each overhaul.\n\nGenerators with more than 800 hours TIS at the effective date of this Directive \\- Within 100 hours TIS after the effective date of this Directive and thereafter between 600 and 800 hours TIS after each overhaul.\n\nThis Airworthiness Directive becomes effective on 30 September 2004.\n\nBackground: The Swedish Luftfartsverket (LFV) has advised that current reliability of the generator brushes is causing premature failures of Starter Generators. These failures may result in a failed engine start or a low voltage situation whilst in flight.","sortOrder":1}],"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This AD narrows intervention to a subset of Saab SF340 airframes: only certain serial numbers and only those without Mod 2533. It further excludes units overhauled under MRB Task 243103 or with brush replacement under MRB Task 243101, while mandating inspections for generators overhauled under MRB Task 243104. In effect, scope is limited to aircraft and generators with particular modification and overhaul histories (see Applicability, Note 1, Requirement)."},"complexity_factors":["Limited applicability tied to specific airframe serial numbers (SF340A S/N 004–159; 340B S/N 160–367) and absence of Mod 2533 (Applicability / Note 1).","Dependency on prior maintenance/modification history: exemptions for generators overhauled under MRB Task 243103 or with brush replacement under MRB Task 243101 (Requirement).","Cross-references to vendor service information and maintenance tasks (Saab SB 340-24-035; MRB tasks 243101/243103/243104).","Staggered compliance windows that depend on current hours in service at the effective date and hours after each overhaul (Compliance).","Regulatory hook to CASR 1998 subregulation 39.1(1) and referral to an LFV AD (Background / Note 2) creating multi-jurisdictional traceability.","Operational impact concentrated on operators/maintenance providers who must schedule inspections, create records, and potentially remove engines from service for access."],"plain_english_summary":"This AD requires repetitive inspections of starter-generator brushes on specified Saab SF340A/B aeroplanes that have not had Mod 2533 (Generator Control Unit p/n 51539-007B) fitted. It sets inspection intervals tied to hours in service and overhaul status, and exempts certain overhaul types. The rule targets operators and maintenance organisations for those serial-numbered aircraft to reduce risk of engine start failures or in-flight low-voltage events by catching premature brush wear."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific unsafe condition in a defined aircraft population. The scope remains tightly focused on starter generator brush inspections for the identified Saab models."},"complexity_factors":["Multiple applicability conditions based on aircraft serial numbers and modification status","Two distinct compliance timelines based on hours-in-service thresholds","Cross-reference to external technical documents (Saab SB 340-24-035, MRB tasks 243101/243103/243104)","Exemption clause for alternative maintenance procedures","Reference to foreign aviation authority directive (LFV AD 1-196 R1)"],"plain_english_summary":"This CASA Airworthiness Directive mandates repeated inspections of starter-generator brushes on certain Saab SF340A/B aeroplanes (specific serials) that have not received Modification 2533. It affects owners/operators of those aeroplanes and requires inspections at defined intervals depending on generator hours, with an exemption for generators overhauled under MRB Tasks 243103/243101. The AD addresses premature brush wear that could prevent engine start or cause in‑flight electrical loss."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-96-dc-starter-generator","history":"/api/acts/ad-sf340-96-dc-starter-generator/history","analysis":"/api/acts/ad-sf340-96-dc-starter-generator/analysis","conflicts":"/api/acts/ad-sf340-96-dc-starter-generator/conflicts","importantCases":"/api/acts/ad-sf340-96-dc-starter-generator/important-cases","documents":"/api/acts/ad-sf340-96-dc-starter-generator/documents"}}