{"id":"F2007L01352","name":"AD/JETSTREAM/104 - Main Landing Gear Radius Rod","slug":"ad-jetstream-104-main-landing-gear-radius-rod","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65603,"registerId":"commonwealth-F2007L01352-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/104 | Main Landing Gear Radius Rod | 6/2007 |\n| ---------------- | ---------------------------- | ------ |\n\n| Applicability: | All Model Jetstream Series 3100 and 3200 aircraft, all serial numbers, fitted with main landing gear radius rod cylinders part number 1847/A through 1847/L and 1862/A through 1862/L, without strike-off 12 or 13.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Inspect the Main Landing Gear Radius Rod Forged Cylinder Flashline in accordance with the Accomplishment Instructions of BAE Systems Service Bulletin 32-JA060741 original issue, or later EASA approved revision.If cracks are found during any inspection, before further flight, replace the radius rod assembly with a serviceable unit.2. Accomplish APPH Service Bulletin 1847-32-12 or 1862-32-12, as applicable, or perform a fluorescent dye penetrant inspection of the cylinder counterbore in accordance with APPH Component Maintenance Manual 32-10-16 Revision 11, or later approved revision.Note 1: Replacement of the affected radius rod assembly by installing a part number 1847/A through 1847/L with strike-off 12 or 13, or 1847/M or later, and part number 1862/A through 1862/L with strike-off 12 or 13, or 1862/M or later, constitutes terminating action for the repetitive inspection requirements of this Directive.Note 2: After 7 September 2007, no radius rod assembly held as spares shall be installed on an aircraft unless it has been inspected in accordance with the requirements of this Directive.Note 3: EASA AD 2007-0087 refers. |\n| Compliance:    | 1. Unless the initial inspection is already accomplished, within 3 months after 10 June 2007. Inspect thereafter at intervals not to exceed 12 months.2. During each radius rod overhaul.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 7 June 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n\n| Background: | The manufacturer received reports of radius rods with cracks starting in the flashline near the microswitch boss. Such cracking can result in the loss of the normal hydraulic system and may lead to a landing gear collapse. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2007","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/104","sectionType":"part","heading":"AD/JETSTREAM/104","content":"## AD/JETSTREAM/104","sortOrder":1},{"sectionNumber":"Main Landing Gear Radius Rod","sectionType":"part","heading":"Main Landing Gear Radius Rod","content":"## Main Landing Gear Radius Rod","sortOrder":2},{"sectionNumber":"6/2007","sectionType":"part","heading":"6/2007","content":"## 6/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is confined to Jetstream Series 3100/3200 aircraft fitted with the listed radius-rod cylinder part numbers lacking strike-off 12 or 13. The Directive adds inspection, replacement, terminating-action and spare-installation rules but does not expand applicability beyond those identified parts and aircraft (Applicability, Requirement, Notes)."},"complexity_factors":["Applicability tied to specific part numbers and strike-off markings, so compliant identification of parts is required (Applicability).","Multiple acceptable inspection methods and referenced documents: BAE Systems Service Bulletin 32-JA060741, APPH Service Bulletins 1847-32-12/1862-32-12, or fluorescent dye penetrant per APPH CMM 32-10-16 Revision 11 (Requirement).","Both repetitive (annual) and overhaul-based inspection triggers are mandated, creating two overlapping compliance schedules (Compliance).","Conditional terminating action: installing specified later strike-off or newer part numbers ends the inspection requirement (Note 1), which creates a replacement-versus-inspect economic trade-off.","A hard prohibition on installing uninspected spares after a calendar date increases logistics and spare-part handling burden (Note 2).","Immediate operational constraint: any crack found requires replacement before further flight, potentially grounding an aircraft until a serviceable assembly is fitted (Requirement).","Compliance deadlines: initial inspection due within 3 months after 10 June 2007 if not already done (Compliance), adding a short-term administrative spike in workload."],"plain_english_summary":"Requires operators of BAe Jetstream 3100/3200 aircraft fitted with specified main landing gear radius rod cylinders (part numbers 1847/A–L and 1862/A–L without strike-off 12 or 13) to inspect the cylinder flashline and counterbore, replace any cracked assemblies before further flight, and repeat inspections at set intervals or at overhaul. Replacing those parts with later strike-off or newer part numbers stops the recurring inspections. The stated purpose is to find and remove cracks that could cause hydraulic loss and a gear collapse; operators pay inspection and replacement costs and must not fit uninspected spares after 7 Sept 2007."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrowly-scoped airworthiness directive focused on a specific mechanical defect in a specific aircraft type. The scope remains tightly focused on the radius rod inspection and replacement requirements as originally intended."},"complexity_factors":["Multiple specific part number ranges requiring careful cross-checking (1847/A-L and 1862/A-L)","Reference to external technical documents (BAE Systems Service Bulletin, APPH Service Bulletins, Component Maintenance Manual)","Conditional logic: different actions required depending on inspection findings (cracks found vs. not found)","Terminating action clause with specific replacement part criteria","Spare parts restriction with date-based cutoff (after 7 September 2007)","Cross-reference to European aviation safety regulation (EASA AD 2007-0087)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of the main landing gear radius rod flashline on British Aerospace Jetstream 3100/3200 aircraft with specified part numbers. Operators must perform an initial and recurring inspection, replace any cracked rods before flight, and fit improved radius rods (or those with strike-off markings) to end the inspection requirement. It prevents landing-gear collapse from undetected cracks."},"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-104-main-landing-gear-radius-rod","history":"/api/acts/ad-jetstream-104-main-landing-gear-radius-rod/history","analysis":"/api/acts/ad-jetstream-104-main-landing-gear-radius-rod/analysis","conflicts":"/api/acts/ad-jetstream-104-main-landing-gear-radius-rod/conflicts","importantCases":"/api/acts/ad-jetstream-104-main-landing-gear-radius-rod/important-cases","documents":"/api/acts/ad-jetstream-104-main-landing-gear-radius-rod/documents"}}