{"id":"F2006B10936","name":"AD/JETSTREAM/66 - Wing - Main Spar Fuel Fitting Attachment Holes","slug":"ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56485,"registerId":"commonwealth-F2006B10936-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/66 - Wing - Main Spar Fuel Fitting Attachment 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/66  Wing - Main Spar Fuel Fitting Attachment Holes\n\nApplicability: Jetstream 3200 Series aircraft up to and including constructor’s number 950.\n\n# 10/94\n\n \n\nRequirement: Modify the fuel tank drainage hole at wing station 64.8 on the left and right hand sides in accordance with British Aerospace SB 57-JM 8175 revision 1.\n\n \n\nCompliance: Prior to 6000 landings or before 15 March 1995 whichever is the later.\n\n \n\nBackground: Cracking of the wing main spar webs has been found at this location on the Jetstream 3200 series wing test specimen.\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\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 model. It has not expanded beyond its original purpose of mandating a wing modification to prevent spar cracking."},"complexity_factors":["Single, specific applicability criterion (constructor's number ≤ 950)","One clear requirement referencing an external technical standard (Service Bulletin)","Simple binary compliance condition (landings OR calendar date, whichever is later)","No defined terms section, no cross-references to other legislation","Background is a single sentence explaining the safety rationale","Total length is approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **British Aerospace Jetstream 3200 series aircraft** (specifically those built up to constructor's number 950) to modify a fuel drainage hole on both wings.\n\n**The problem:**\nCracks were discovered in the wing's main structural support (the \"spar\") during testing. The existing fuel fitting attachment holes were found to be a weak point where cracking could start.\n\n**What must be done:**\nAircraft must be modified following **British Aerospace Service Bulletin 57-JM 8175 revision 1** — essentially the manufacturer's official repair instructions.\n\n**When it must be done:**\nBefore the aircraft completes 6,000 landings **or** before 15 March 1995, whichever comes later.\n\n**Who it affects:**\nOwners, operators, and maintenance organisations responsible for Jetstream 3200 aircraft with serial numbers up to 950.\n\n**Why it matters:**\nWing spar cracks can lead to structural failure and potentially catastrophic loss of the aircraft. This directive prevents that by mandating a proven fix before the aircraft reaches a critical wear threshold."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD identifies a targeted remedial action for Jetstream 3200 aircraft up to constructor’s number 950 and specifies the timeframe for compliance. The document itself contains no indication that its scope was altered from its original intent; it sets a single technical requirement tied to a stated safety observation (Background; Requirement; Compliance)."},"complexity_factors":["Narrow applicability: single aircraft model/serial range (Applicability)","Single, specific technical action referenced (modify fuel tank drainage hole at wing station 64.8) (Requirement)","Compliance defined by simple numeric/time threshold (prior to 6,000 landings or before 15 March 1995) (Compliance)","Dependence on an external technical document (British Aerospace SB 57-JM 8175 rev 1) for implementation details (Requirement)","Limited procedural or administrative detail in the AD (no alternative compliance or approval pathways described) (Requirement; Compliance)"],"plain_english_summary":"This AD requires owners/operators of Jetstream 3200 aircraft up to constructor’s number 950 to modify the fuel tank drainage hole at wing station 64.8 on both wings per BAe Service Bulletin 57‑JM 8175 Rev 1. The modification must be done before 6,000 landings or 15 March 1995 (whichever is later) to address observed wing spar web cracking; the compliance obligation (and cost) rests with the owner/operator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes","history":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes/history","analysis":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes/analysis","conflicts":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes/conflicts","importantCases":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes/important-cases","documents":"/api/acts/ad-jetstream-66-wing-main-spar-fuel-fitting-attachment-holes/documents"}}