{"id":"F2006B10955","name":"AD/JETSTREAM/86 - Rudder Quadrant Support Structure","slug":"ad-jetstream-86-rudder-quadrant-support-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56522,"registerId":"commonwealth-F2006B10955-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \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 CAR 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.","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/86 Rudder Quadrant Support ","sectionType":"part","heading":"AD/JETSTREAM/86 Rudder Quadrant Support Structure 5/2000","content":"# AD/JETSTREAM/86 Rudder Quadrant Support Structure 5/2000\n\nApplicability: All Series 200 and Jetstream 3100 and 3200 Series aircraft excluding Constructors numbers 936 and 940.\n\nRequirement: Inspect in accordance with BAe Mandatory Service Bulletin (SB) 53-JA-990842 or 53-JA-990842 Revision 1.\n\nOn aircraft where this inspection and repair has been carried out in accordance with SB 53-JA-990842, a check is required to ensure correct rivets have been used.\n\nNote: UK CAA AD 006-12-99 refers.\n\nCompliance: Before 31 December 2000, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 18 May 2000.\n\nBackground: Occurrences of damage to the rudder quadrant support structure have been reported. The damage relates to cracking of the support structure upper edge member radii and bottom diaphragm radii adjacent to the rudder artificial feel assembly attachment.\n\nThe damage is caused by incorrectly installed profiled D-washers which are designed to reinforce the radii when they are installed correctly.\n\n![Signature of Bernard Malcolm Hole Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 4 April 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 19 April 2000.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific mechanical defect in specific aircraft models. It has not expanded beyond its original purpose of addressing the incorrectly installed D-washer issue."},"complexity_factors":["Single, specific mechanical issue (rudder quadrant support cracking)","Only one primary requirement (inspect per referenced service bulletin)","Single compliance deadline with one exception clause","Limited applicability (three aircraft series, minus two serial numbers)","One sub-requirement (rivet check) for previously repaired aircraft","No nested definitions, no conditional logic beyond the applicability exclusion","Short document (approximately 250 words excluding headers/images)"],"plain_english_summary":"This safety order requires Australian operators of British Aerospace Jetstream Series 200, 3100 and 3200 (except S/N 936 and 940) to inspect the rudder quadrant support structure per BA service bulletin SB 53-JA-990842 because incorrectly fitted D‑washers have caused cracking.  \n\nInspections (and verification of correct rivets where repairs were done) must be completed before 31 December 2000 to prevent possible loss of directional control."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD's scope addresses the unsafe condition described (cracking of rudder quadrant support radii) for the specified aircraft types and does not expand or narrow that scope beyond the actions and deadlines stated in the AD text."},"complexity_factors":["Narrow aircraft applicability with specific exclusions (Applicability)","Mandates inspection and repair in accordance with an external BAe Mandatory Service Bulletin rather than prescribing detailed steps in the AD itself (Requirement)","Requires an additional verification step for rivet type where the SB has already been applied (Requirement)","Fixed statutory compliance deadline creating a one-time scheduling pressure (Compliance)","Technical cause linked to incorrectly installed profiled D-washers and local cracking, requiring structural inspection and possible repair (Background)"],"plain_english_summary":"This Airworthiness Directive requires operators of Jetstream Series 200, 3100 and 3200 aircraft (except constructor numbers 936 and 940) to inspect and, if necessary, repair the rudder quadrant support structure following BAe Mandatory Service Bulletin 53-JA-990842. Where that SB has already been applied, operators must check that the correct rivets were used. The CASA delegate issued the AD and set a compliance deadline of 31 December 2000 (Requirement; Compliance). Operators pay for inspections/repairs and must change their maintenance work accordingly."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure","history":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure/history","analysis":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure/analysis","conflicts":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure/conflicts","importantCases":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure/important-cases","documents":"/api/acts/ad-jetstream-86-rudder-quadrant-support-structure/documents"}}