{"id":"F2021L00589","name":"AD/JABIRU/4 Control Surface Hinge - Inspections","slug":"ad-jabiru-4-control-surface-hinge-inspections","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":101768,"registerId":"commonwealth-F2021L00589-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Avtech (Jabiru Aircraft) Series Aeroplan","sectionType":"part","heading":"Avtech (Jabiru Aircraft) Series Aeroplanes","content":"# Avtech (Jabiru Aircraft) Series Aeroplanes\n\n| AD/JABIRU/4 | Control Surface Hinge - Inspections | 10/2021 |\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 all control surface hinges in accordance with Jabiru Service BulletinJSB 044-1 ‘Section 4 - Inspection Procedure’, as in force from time to time.2. Repeat inspection of all control surface hinges outlined in Requirement 1.3. Report the results of the inspection to CASA via the Defect Report System.4. If any corrosion or cracking is found during an inspection, corrective action must be taken.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:    | 1. Before exceeding 5 years total time in service of the aircraft.2. At each 100 hourly inspection or Annual Inspection, whichever occurs first.3. Each time the inspection is performed.4. Before any further flight.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This AD commences on 21 May 2021.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | The Jabiru Service Bulletin JSB044-1 referenced in this Airworthiness Directive was released on 8 January 2021 (effective 15 January 2021), in response to the detection of an aileron hinge failure which was found during a pre-flight controls check on a 20-year-old Jabiru SP4 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n\n![](image.001.jpeg)\n\nRichard Stocker  \nDelegate of the Civil Aviation Safety Authority\n\n17 May 2021","sortOrder":0},{"sectionNumber":"AD/JABIRU/4","sectionType":"part","heading":"AD/JABIRU/4","content":"## AD/JABIRU/4","sortOrder":1},{"sectionNumber":"Control Surface Hinge - Inspections","sectionType":"part","heading":"Control Surface Hinge - Inspections","content":"## Control Surface Hinge - Inspections","sortOrder":2},{"sectionNumber":"10/2021","sectionType":"part","heading":"10/2021","content":"## 10/2021","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":true,"description":"The underlying manufacturer service bulletin applied to all Jabiru models, but the AD confines mandatory inspections to type‑certificated models only; light sport aircraft referenced by the bulletin are excluded from this AD and are instead subject to a Manufacturer’s Safety Direction (Note 1). This narrows the AD's regulatory scope relative to the bulletin while leaving the bulletin's broader technical advice in place."},"complexity_factors":["Reliance on an external manufacturer document 'JSB044-1' with the phrase 'as in force from time to time' (Note 2) — creates ongoing dependency on the latest version.","Multiple, overlapping compliance timings (before 5 years TIS; each 100‑hour or annual inspection; and immediate action 'before any further flight' if defects found).","Mandatory reporting to CASA via the Defect Report System increases administrative burden on owners/operators.","Corrective-action-before-flight requirement imposes potential immediate maintenance costs and operational grounding until fixed.","Applicability limited to type‑certificated models while the referenced service bulletin covers all models, requiring coordination with separate Manufacturer’s Safety Direction for LSA models (Note 1).","Commencement date specified (21 May 2021) — creates a fixed enforcement start for compliance planning."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of type‑certificated Avtech (Jabiru) aeroplanes to inspect all control‑surface hinges using Jabiru Service Bulletin JSB044‑1, report the inspection results to CASA, and carry out corrective repairs before further flight if corrosion or cracking is found. Inspections must occur before the aircraft exceeds 5 years total time in service and then at each 100‑hour or annual inspection. Owners/operators pay for inspections and repairs; CASA receives defect reports and monitors compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety issue (control surface hinge failures) on specific Jabiru aircraft models. The document explicitly excludes light sport aircraft variants to avoid overlap with manufacturer safety directions, showing disciplined scope management rather than scope creep."},"complexity_factors":["Very short document (approximately 300 words)","Only 4 numbered requirements with clear compliance deadlines","Single cross-reference to Jabiru Service Bulletin JSB 044-1 (with 'as in force from time to time' incorporation)","Simple conditional logic: only one trigger for immediate action (finding corrosion/cracking)","Limited applicability list (8 specific aircraft models)","No nested definitions or interpretation section","Clear, tabular presentation of requirements and compliance times"],"plain_english_summary":"This AD orders mandatory inspections of all control-surface hinges on type‑certificated Jabiru aircraft, prompted by a real aileron‑hinge failure. It affects owners/operators of those certified Jabiru models and aims to detect corrosion or cracking before it leads to in‑flight loss of control.\n\nInspections are required before 5 years’ total time, then every 100 flight hours or at annual inspection; findings must be reported to CASA and aircraft with corrosion or cracks are grounded until repaired."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections","history":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections/history","analysis":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections/analysis","conflicts":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections/conflicts","importantCases":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections/important-cases","documents":"/api/acts/ad-jabiru-4-control-surface-hinge-inspections/documents"}}