{"id":"F2006B10917","name":"AD/JETSTREAM/48 - Wing Main Spar Access Panel - Cold Worked Holes","slug":"ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56460,"registerId":"commonwealth-F2006B10917-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/48 - Wing Main Spar Access Panel - Cold Worked Holes","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n \n\n# AD/JETSTREAM/48  Wing Main Spar Access Panel - Cold Worked Holes\n\nApplicability: All series 3200 aircraft up to and including constructor number 922.\n\n# 10/91\n\n \n\nRequirement: Action in accordance with the Requirements of BAe Service Bulletin 57-JM 8160, dated 19 June 1991.\n\n \n\nNote: This Service Bulletin is classified as Mandatory by the UK CAA.\n\n \n\nCompliance: Prior to exceeding 6000 flights, or prior to 31 December 1991, whichever is the later.\n\n \n\nThe Australian CAA recommend early compliance.\n\n \n\nBackground: Multi-site cracking of the wing main spar webs has been found on the Jetstream Series 3200 wing fatigue test specimen. Cold expansion of the critical holes is to designed to improve the structures resistance to cracking.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific structural defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a fatigue-life improvement modification."},"complexity_factors":["Single, specific applicability (one aircraft series, specific constructor numbers)","Single requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline (flights OR calendar date, whichever is later)","No defined terms section","No cross-references to other legislation or regulations","No conditional logic or nested exceptions","Very short document (approximately 200 words of substantive content)"],"plain_english_summary":"This mandatory Airworthiness Directive affects British Aerospace Jetstream 3200 aircraft up to constructor number 922. It requires operators to carry out BAe Service Bulletin 57-JM 8160 (cold working holes in the wing main spar access panel) to arrest fatigue cracking found in the spar webs.\n\nThe work must be completed before 6,000 flights or by 31 December 1991 (whichever is later); aircraft are grounded for flight without compliance."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive enforces the BAe Service Bulletin for a defined subset of Jetstream 3200 aircraft to improve spar fatigue resistance. It does not broaden applicability beyond the stated fleet or impose requirements beyond the Service Bulletin and the specified compliance deadline; therefore the scope aligns with the original stated intent to address multi‑site cracking."},"complexity_factors":["Narrow, clearly defined applicability (Series 3200 up to constructor number 922) reduces scope complexity.","Single technical requirement delegated to a manufacturer Service Bulletin (57‑JM 8160) concentrates technical detail outside the AD.","Fixed compliance trigger (6,000 flights or specific calendar date) simplifies timing but creates operational scheduling pressure.","Requirement concerns safety‑critical structural work (cold expansion) that may need specialist tooling and skilled maintenance personnel.","Reference to UK CAA classification (Service Bulletin classified as Mandatory) adds an international regulatory cross‑reference.","Enforcement and record‑keeping responsibility sits with operators/owners, creating straightforward but non‑trivial compliance burden."],"plain_english_summary":"This Airworthiness Directive requires operators of British Aerospace Jetstream Series 3200 aircraft (constructor numbers up to 922) to cold‑work the critical holes in the wing main spar access panel per BAe Service Bulletin 57‑JM 8160. The change is aimed at reducing multi‑site fatigue cracking. Operators must complete the modification before the aircraft exceeds 6,000 flights or by 31 December 1991, whichever is later; the cost and downtime fall to aircraft owners/operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes","history":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes/history","analysis":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes/analysis","conflicts":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes/conflicts","importantCases":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes/important-cases","documents":"/api/acts/ad-jetstream-48-wing-main-spar-access-panel-cold-worked-holes/documents"}}