{"id":"F2006B10964","name":"AD/JETSTREAM/98 - Fuselage and Wing Structure Fatigue Damage - 2","slug":"ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56535,"registerId":"commonwealth-F2006B10964-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/98 - Fuselage and Wing Structure Fatigue Damage - 2","content":"![](image.001.png)\n\n![](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\nBritish Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\nAD/JETSTREAM/98 Fuselage and Wing Structure Fatigue\n\nDamage \\- 2\n\n  \n10/2004\n\nApplicability: All Model Jetstream Series 3100 aircraft.\n\nRequirement: Inspect in accordance with BAE Systems Mandatory Service Bulletin (SB) 51- JA030544 Revision 1 or later EASA approved edition.\n\nThe original issue of the Requirement document contained a typographical error. If a detailed visual inspection was performed with the windows removed then full credit can be taken for the accomplishment of the initial inspection. If a detailed visual inspection was performed with the windows installed, the clarified NDI task stated in Revision 1 of the Requirement document, Appendix 1, Paragraph M, Part 14, must be performed before 1 July 2005. Thereafter, all subsequent window pan inspections are to be accomplished on or before the repeat interval stated in the Requirement document.\n\nNote: UK CAA AD G-2004-0018 refers.\n\nCompliance: At the initial and repeat inspection times specified in the Requirement document; from the effective date of this Directive.\n\nNew requirements introduced by SB 51-JA030544 Revision 1, are stated in Paragraph M – Approval, Appendix 2, Part 1. For the tasks defined in SB 51- JA030544 Revision 1, Appendix 1, Paragraph M, Parts 14 and 15, where the initial inspection interval is stated as 25,800 landings or 10 years, the requirement: whichever occurs first, is to apply. Where the repeat inspection interval is stated as: 4,400 landings or 2 years, the requirement: whichever occurs first, is to apply.\n\nWhere the inspection interval is stated as: 4,400 landings or D check, this is to be read as: 4,400 landings or 2 years, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 30 September 2004.\n\nBackground: An extensive review of the results of the wing fatigue test and aircraft life extension investigation has been completed for Jetstream 3100 aircraft. This Directive introduces new and revised inspections of the fuselage and wing structure for fatigue damage.\n\nBritish Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\nAD/JETSTREAM/98 (continued)\n\nAmendment 1 is issued in response to a new CAA AD, which introduces a revision of the Requirement document with revised inspection techniques deemed necessary to adequately accomplish certain inspection tasks, and to specify grace periods applicable for aircraft that have exceeded the initial inspection thresholds.\n\n![Signature of David Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 5 August 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.","sortOrder":0}],"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":4,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: ensuring structural integrity of Jetstream 3100 aircraft through fatigue inspections. While it introduces revised inspection techniques and grace periods, these are refinements to the existing safety mandate rather than expansion into new regulatory areas."},"complexity_factors":["Multiple cross-references to external technical documents (BAE Systems Service Bulletin 51-JA030544 Revision 1, UK CAA AD G-2004-0018) that are not reproduced in the text","Conditional logic for inspection intervals with 'whichever occurs first' triggers (landings vs. time vs. maintenance checks)","Nested exceptions for window inspection credits based on prior inspection method (removed vs. installed)","Grace period provisions for aircraft that have already exceeded initial inspection thresholds","Dual effective dates (30 September 2004 for the AD, 1 July 2005 for specific NDI tasks)","Amendment structure referencing prior versions and typographical error corrections"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of British Aerospace Jetstream 3100 aircraft in Australia to follow BAE Systems Service Bulletin 51-JA030544 Rev 1 for detailed inspections of fuselage and wing structures to detect fatigue cracks. Initial and recurring inspections are mandated on a flight-cycle or time basis (whichever comes first), with a specific repeat interval; a special rule applies if windows were previously inspected removed versus installed. Cracks could cause in-flight structural failure, and compliance is legally required."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 1 revises the original AD by introducing revised inspection techniques, clarifying NDI tasks, specifying grace periods for aircraft that exceeded initial thresholds, and changing how certain intervals are read (including interpreting a ‘D check’ as 2 years). These additions expand and refine the original inspection requirements rather than narrowing them."},"complexity_factors":["Mandatory incorporation of an external Service Bulletin (BAE SB 51-JA030544 Rev 1) and allowances for later EASA-approved editions, creating dependency on external documents.","Clarification of a prior typographical error and conditional crediting (credit if detailed visual inspection done with windows removed) increases compliance nuance.","Introduction and clarification of NDI tasks (Revision 1, Appendix 1, Paragraph M, Part 14) with a firm deadline before 1 July 2005 for certain inspections.","Multiple inspection interval expressions using ‘whichever occurs first’ across different tasks: 25,800 landings or 10 years; 4,400 landings or 2 years; and re‑reading ‘D check’ as 2 years.","Grace‑period mechanics and retroactive applicability for aircraft that exceeded initial thresholds add administrative tracking and scheduling complexity.","Cross‑reference to UK CAA AD and requirement document revisions creates multi‑jurisdictional compliance tracing.","Enforcement by CASA delegate establishes regulatory discretion over acceptance of compliance and interpretation of the Requirement document."],"plain_english_summary":"This Airworthiness Directive requires operators of all BAe Jetstream 3100 aircraft to carry out specified inspections of fuselage and wing structure for fatigue, following BAE Systems Mandatory Service Bulletin 51-JA030544 Revision 1 (or later EASA-approved edition). It sets initial and repeat inspection timing and clarifies non-destructive inspection (NDI) tasks and deadlines.\n\nAircraft operators pay for and schedule the inspections and must comply by the dates; the CASA delegate enforces the directive. The AD revises earlier inspection requirements to reflect wing fatigue test and life‑extension findings."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2","history":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2/history","analysis":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2/analysis","conflicts":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2/conflicts","importantCases":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2/important-cases","documents":"/api/acts/ad-jetstream-98-fuselage-and-wing-structure-fatigue-damage-2/documents"}}