{"id":"F2008L00493","name":"AD/J4100/4 - Landing Gear Drag Brace Spherical Bearing","slug":"ad-j4100-4-landing-gear-drag-brace-spherical-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119307,"registerId":"commonwealth-F2008L00493-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"BAe Systems (Operations) Jetstream 4100 ","sectionType":"division","heading":"BAe Systems (Operations) Jetstream 4100 Series Aeroplanes","content":"### BAe Systems (Operations) Jetstream 4100 Series Aeroplanes\n\n| AD/J4100/4 | Landing Gear Drag Brace Spherical Bearing | 4/2008 DM |\n| ---------- | ----------------------------------------- | --------- |\n\n| Applicability: | Jetstream Series 4100 Aircraft, constructors numbers 41004 through 41100.                                                                                             |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Jetstream Alert Service Bulletin J41-A32-061 Revision 1 or later NAA approved revision.Note: UK CAA AD 003-07-97 refers.                    |\n| Compliance:    | As detailed in Jetstream Alert Service Bulletin J41-A32-061 Revision 1 or later NAA approved revision with a revised effective date as the effective date of this AD. |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                   |\n| Background:    | The actions detailed din this AD are intended to ensure the structural integrity of the landing gear drag brace.                                                      |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n14 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/4","sectionType":"part","heading":"AD/J4100/4","content":"## AD/J4100/4","sortOrder":1},{"sectionNumber":"Landing Gear Drag Brace Spherical Bearin","sectionType":"part","heading":"Landing Gear Drag Brace Spherical Bearing","content":"## Landing Gear Drag Brace Spherical Bearing","sortOrder":2},{"sectionNumber":"4/2008 DM","sectionType":"part","heading":"4/2008 DM","content":"## 4/2008 DM","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1969},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is the original issuance of the directive, establishing the initial safety requirement for the landing gear component."},"complexity_factors":["Single, unambiguous requirement referencing an external technical standard","No defined terms or interpretation sections","No conditional logic, exceptions, or nested provisions","Narrow applicability limited to specific aircraft serial numbers"],"plain_english_summary":"**What this does:** This directive mandates urgent safety maintenance on specific BAe Jetstream 4100 aircraft to prevent landing gear failure.\n\n**Who it affects:** Owners and operators of Jetstream 4100 aircraft with constructor numbers (serial numbers) 41004 through 41100.\n\n**What must be done:** Operators must follow the instructions in **Jetstream Alert Service Bulletin J41-A32-061 Revision 1** (or later approved versions) regarding the **landing gear drag brace spherical bearing** — a critical joint in the aircraft's undercarriage.\n\n**Why it matters:** The drag brace is a structural component that helps hold the landing gear in place. This directive ensures the spherical bearing within that brace maintains structural integrity, preventing potential landing gear collapse."}},"importantCases":[],"_links":{"self":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing","history":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing/history","analysis":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing/analysis","conflicts":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing/conflicts","importantCases":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing/important-cases","documents":"/api/acts/ad-j4100-4-landing-gear-drag-brace-spherical-bearing/documents"}}