{"id":"F2021L00113","name":"AD/JABIRU/3\tAileron Control Tube","slug":"ad-jabiru-3-aileron-control-tube","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":101243,"registerId":"commonwealth-F2021L00113-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Avtech (Jabiru Aircraft) Series Aeroplan","sectionType":"division","heading":"Avtech (Jabiru Aircraft) Series Aeroplanes","content":"### Avtech (Jabiru Aircraft) Series Aeroplanes\n\n| AD/JABIRU/3 | Aileron Control Tube | Biweekly |\n| ----------- | -------------------- | -------- |\n\n| Applicability: | Type certificated Avtech (Jabiru Aircraft) models UL-C, UL-D, J160-C, LSA 55/2K, LSA 55/2J, Jabiru ST, LSA 55/3J and Jabiru ST3 - all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Inspect the aileron control tube in accordance with the requirements of Jabiru Service Bulletin (JSB) JSB 042-1, as in force from time to time.2. Report the results of the inspection to CASA via the Defect Report System.3. If any cracking is found to the aileron control tube during the inspection, corrective action must be taken in accordance with JSB 042-1.Note 1: The referenced service bulletin is applicable to ALL Jabiru aircraft models. Some of these models are light sport aircraft and are not subject to this Airworthiness Directive but are subject to a Manufacturer’s Safety Direction. Consequently, only type certificated models are included in the applicability section of this AD.Note 2: The words “as in force from time to time” require compliance with the most recent version of the referenced document. |\n| Compliance:    | No later than 4,000 hours’ total time in service:1. a. Before further flight after the commencement date of this Airworthiness Directive, and thereafter,b. At each 100 hourly or Annual Inspection whichever occurs first.2. Each time the inspection is performed.3 Before any further flight.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 21 March 2021.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| Background:    | Jabiru Service Bulletin JSB 042-1 was released on 16 May 2019 to address a fracture failure of an aileron control tube that occurred during the landing roll of a Jabiru 160C training aircraft that was being flown by a student pilot.The Service Bulletin referenced in this Airworthiness Directive requires an inspection of the aileron control torque tube where it connects to the control stick pivot plate for cracking at each of four quadrants. Analysis of the failed part showed that one quadrant had been cracked through for some time before complete failure occurred.A complete failure of an aileron torque tube may result in loss of the pilot’s primary lateral and pitch controls.                                                                                                                                           |\n\n![](image.001.jpeg)\n\nDavid Charles Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n10 February 2021","sortOrder":0},{"sectionNumber":"AD/JABIRU/3","sectionType":"part","heading":"AD/JABIRU/3","content":"## AD/JABIRU/3","sortOrder":1},{"sectionNumber":"Aileron Control Tube","sectionType":"part","heading":"Aileron Control Tube","content":"## Aileron Control Tube","sortOrder":2},{"sectionNumber":"Biweekly","sectionType":"part","heading":"Biweekly","content":"## Biweekly","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The underlying service bulletin was issued for ALL Jabiru models (Background/JSB 042‑1) but the AD limits legal applicability to type‑certificated models only (Applicability, Note 1). Light sport models remain subject to a Manufacturer’s Safety Direction rather than this AD, shifting oversight and enforcement from the regulator’s AD mechanism to the manufacturer’s direction. Additionally, the AD’s reliance on JSB 042‑1 “as in force from time to time” (Requirement, Note 2) extends compliance obligations as the bulletin is updated."},"complexity_factors":["Reference to an external, dynamically updated document: compliance requires following JSB 042‑1 “as in force from time to time” (Requirement, Note 2) — creates ongoing update risk and need to track revisions.","Scope divergence: JSB applies to ALL Jabiru models but the AD only lists type‑certificated models (Applicability, Note 1) — creates parallel regulatory paths (AD vs Manufacturer’s Safety Direction).","Multiple timing triggers: a hard cap of 4,000 hours TIS plus immediate before‑further‑flight and recurring 100‑hour or annual inspections (Compliance) — operational scheduling burden.","Mandatory reporting: inspection results must be reported to CASA via the Defect Report System (Requirement 2) — administrative cost and recordkeeping.","Corrective actions delegated to manufacturer bulletin: fixes are to be taken in accordance with JSB 042‑1 (Requirement 3) — reliance on manufacturer procedures and potential variation in remedy standards.","Technical specificity: inspection focuses on the torque‑tube connection and four quadrants (Background/Requirement) — requires specific technical skill or certified maintenance resources.","Safety consequence: complete torque tube failure can lead to loss of primary lateral and pitch control (Background) — high operational consequence increases enforcement priority.","Effective date and enforcement: AD becomes effective 21 March 2021 (Compliance) — creates immediate legal obligation from that date."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified type‑certificated Jabiru aeroplane models to inspect the aileron control (torque) tube per Jabiru Service Bulletin JSB 042‑1, report findings to CASA, and apply any corrective actions if cracking is found. It targets models where failure could cause loss of primary lateral and pitch control. Inspections must be done by specified flight‑time/inspection intervals and before further flight if a defect is found."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains focused scope on its original safety purpose. It targets a specific mechanical failure mode (aileron control tube cracking) discovered through an incident investigation, applies only to the affected aircraft models, and requires the specific remedial action outlined in the manufacturer's service bulletin. The exclusion of light sport aircraft variants (handled separately via Manufacturer's Safety Direction) actually narrows the scope appropriately rather than expanding it."},"complexity_factors":["Single technical subject matter (one aircraft component) with straightforward inspection requirements","Only 7 specific aircraft models listed in applicability, though with 'all serial numbers' scope","Three simple numbered requirements (inspect, report, repair if cracked)","Two explanatory notes clarifying scope and document versioning","Standard aviation terminology used throughout (aileron, torque tube, service bulletin) but explained in context","Clear compliance timeline with specific flight hour triggers and deadlines","No nested exceptions or complex conditional logic — just 'if cracked, then fix before flight'","Cross-reference to external document (Jabiru Service Bulletin JSB 042-1) but with 'as in force from time to time' clause to handle updates automatically"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of the aileron control tube on specified type-certificated Jabiru models to detect cracks, requires repairs before flight if cracks are found, and demands inspection results be reported to CASA. It applies to fully certified Jabirus (not LSA versions) and aims to prevent in‑flight loss of roll control after a reported control‑tube fracture."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jabiru-3-aileron-control-tube","history":"/api/acts/ad-jabiru-3-aileron-control-tube/history","analysis":"/api/acts/ad-jabiru-3-aileron-control-tube/analysis","conflicts":"/api/acts/ad-jabiru-3-aileron-control-tube/conflicts","importantCases":"/api/acts/ad-jabiru-3-aileron-control-tube/important-cases","documents":"/api/acts/ad-jabiru-3-aileron-control-tube/documents"}}