{"id":"F2006B02173","name":"AD/AC-100/4 - Wing Fairing - Installation","slug":"ad-ac-100-4-wing-fairing-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41403,"registerId":"commonwealth-F2006B02173-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-100/4 - Wing Fairing - Installation","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 8/1968,Aircraft below 5700 kg,S.L. Industries Commander 100 Series and Volair 10 Series Aeroplanes,Wing Fairing - Installation,4\ntitle: Airworthiness Directive - AD/AC-100/4 - Wing Fairing - Installation\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  S.L. Industries Commander 100 Series and Volair 10 Series Aeroplanes\n\n \n\nAD/AC-100/4 Wing Fairing - Installation 8/68\n\nApplicability: All models with S/Nos. 026 to 051. Document:  Aero Commander Model 100 SL No. 14. Compliance:               Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive issued in 1968 for a specific airworthiness issue. It has not expanded beyond its original purpose of mandating wing fairing installation on specific aircraft serial numbers."},"complexity_factors":["Extremely short document (approximately 100 words)","No defined terms section","No cross-references to other legislation beyond citation of Civil Aviation Regulations 1998, Part 39","No conditional logic or exceptions","Single, unambiguous applicability criterion (serial numbers 026–051)","Single compliance requirement with immediate deadline"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific aircraft owners to take immediate action.\n\n**What it does:**\n- Requires the installation of a wing fairing (a smooth aerodynamic cover) on certain small aircraft\n- Applies to **S.L. Industries Commander 100 Series and Volair 10 Series aeroplanes** with serial numbers 026 through 051\n- Cites technical document \"Aero Commander Model 100 SL No. 14\" as the installation standard\n\n**Who it affects:**\n- Owners and operators of these specific light aircraft (under 5,700 kg)\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. \"Forthwith\" compliance means this fix must happen immediately — not at the next scheduled maintenance. The wing fairing likely addresses an aerodynamic or structural issue that could affect flight safety.\n\n**Key details:**\n- **Issue date:** August 1968 (Issue 8/68)\n- **Compliance deadline:** Immediate (\"Forthwith\")\n- **Scope:** Limited to specific serial number range (026–051)"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text contains no indication that the scope has been altered from an earlier version. It expressly applies to S/Nos. 026–051, references the Aero Commander Model 100 SL No. 14 technical document, and requires compliance forthwith; there is no textual sign within the instrument that the set of affected aircraft or the required action has been changed."},"complexity_factors":["Narrow applicability limited to specific serial numbers (Applicability: All models with S/Nos. 026 to 051).","Directive refers to an external technical document for procedural detail rather than including instructions in‑line (Document: Aero Commander Model 100 SL No. 14).","Immediate compliance requirement ('Forthwith') increases urgency but provides no timetable or staged compliance options (Compliance: Forthwith).","No in‑text provisions on exemptions, alternative methods of compliance, enforcement, or cost recovery are included in the instrument.","Authority and legal basis are summarized on the face (Civil Aviation Regulations, Part 39), so statutory power to issue is apparent but operational detail is sparse."],"plain_english_summary":"This Airworthiness Directive from CASA requires immediate installation of a wing fairing on S.L. Industries Commander 100 and Volair 10 series aeroplanes with serial numbers 026–051. Compliance is “forthwith” and operators must follow the procedures in “Aero Commander Model 100 SL No. 14.” Owners/operators are responsible for sourcing parts, labour and downtime; the AD itself does not set out exemptions, alternatives or a cost/benefit analysis."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-100-4-wing-fairing-installation","history":"/api/acts/ad-ac-100-4-wing-fairing-installation/history","analysis":"/api/acts/ad-ac-100-4-wing-fairing-installation/analysis","conflicts":"/api/acts/ad-ac-100-4-wing-fairing-installation/conflicts","importantCases":"/api/acts/ad-ac-100-4-wing-fairing-installation/important-cases","documents":"/api/acts/ad-ac-100-4-wing-fairing-installation/documents"}}