{"id":"F2008L00723","name":"AD/JETSTREAM/105 - Nose Landing Gear Wheel Outer Cone","slug":"ad-jetstream-105-nose-landing-gear-wheel-outer-cone","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72760,"registerId":"commonwealth-F2008L00723-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 3100 (Jetstream) S","sectionType":"division","heading":"British Aerospace BAe 3100 (Jetstream) Series Aeroplanes","content":"### British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n| AD/JETSTREAM/105 | Nose Landing Gear Wheel Outer Cone | 4/2008 |\n| ---------------- | ---------------------------------- | ------ |\n\n| Applicability: | All Model Jetstream Series 3100 and 3200 aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of EASA AD 2008-0037.Note: BAE SYSTEMS (Operations) Limited Service Bulletin 32-JA070241 original issue, or later EASA approved revision, refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of10 April 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 10 April 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | A failure mode has been identified following the examination of parts from a Jetstream 4100 Series aircraft, that can lead to the loss of a nose wheel. Jetstream Series 3100 and 3200 aircraft use a similar method of retaining the wheel assemblies on the NLG axle. A combination of excessive wear and/or adverse tolerances on the axle inner cone, outer cone or wheel hub splined sleeve cones results in the loss of the critical gap between the inner flange face of the wheel outer cone and the axle end face. This condition, if not corrected, can cause the wheel nut lock plate to break, leading to the wheel retention nut unscrewing and subsequent separation of the nose wheel from the NLG axle. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 February 2008","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/105","sectionType":"part","heading":"AD/JETSTREAM/105","content":"## AD/JETSTREAM/105","sortOrder":1},{"sectionNumber":"Nose Landing Gear Wheel Outer Cone","sectionType":"part","heading":"Nose Landing Gear Wheel Outer Cone","content":"## Nose Landing Gear Wheel Outer Cone","sortOrder":2},{"sectionNumber":"4/2008","sectionType":"part","heading":"4/2008","content":"## 4/2008","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Based solely on the text provided, the AD applies to all Jetstream 3100 and 3200 aircraft (all serial numbers) and mandates action per EASA AD 2008-0037 and the BAE service bulletin. The document contains no indication that this scope departs from the original stated intent."},"complexity_factors":["Cross-reference to external EASA AD (EASA AD 2008-0037) and a manufacturer service bulletin (BAE SB 32-JA070241), requiring users to consult multiple documents.","Technical, engineering-specific failure mode (axle/cone/wheel hub spline tolerances and wear) that needs specialised inspection and repair skills.","Applies to all serial numbers of two aircraft series, widening operational coverage and fleet impact.","Safety-critical consequence (nose wheel separation) increases administrative and operational urgency and scrutiny.","Prescriptive compliance date (effective 10 April 2008) creates fixed short-term implementation timeline.","Potential variability in corrective action: AD mandates compliance with the referenced documents rather than listing a single uniform fix, producing case-by-case maintenance decisions."],"plain_english_summary":"This Airworthiness Directive requires operators of all British Aerospace Jetstream Series 3100 and 3200 aeroplanes to perform inspections and any corrective action for the nose landing‑gear wheel outer cone in accordance with *EASA AD 2008‑0037* (and the referenced BAE Systems Service Bulletin 32‑JA070241). It matters because excessive wear or incorrect cone/tolerance can break the wheel nut lock plate and allow the nose wheel to separate; operators bear the inspection and repair costs and must comply by the effective date (10 April 2008)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose directive (approximately 250 words of substantive content)","Only 1 defined term implicitly referenced (NLG = Nose Landing Gear)","Single cross-reference to external document (EASA AD 2008-0037) — the actual technical requirements are contained there, not in this instrument","No nested exceptions or conditional logic; straightforward applicability ('all' aircraft of specified models)","Simple compliance structure: follow the European directive"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and corrective action on the nose landing gear “outer cone” of British Aerospace Jetstream 3100 and 3200 aircraft to prevent wheel separation caused by wear or manufacturing tolerance issues.  \n\nIt adopts EASA AD 2008-0037 and BAE Systems Service Bulletin 32-JA070241, affects all owners/operators and maintenance personnel, was prompted by a similar Jetstream 4100 failure, and required compliance from 10 April 2008."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone","history":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone/history","analysis":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone/analysis","conflicts":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone/conflicts","importantCases":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone/important-cases","documents":"/api/acts/ad-jetstream-105-nose-landing-gear-wheel-outer-cone/documents"}}