{"id":"F2006B02174","name":"AD/AC-100/5 - Tubular Structure - Corrosion Proofing","slug":"ad-ac-100-5-tubular-structure-corrosion-proofing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41404,"registerId":"commonwealth-F2006B02174-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-100/5 - Tubular Structure - Corrosion Proofing","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,Tubular Structure - Corrosion Proofing,5\ntitle: Airworthiness Directive - AD/AC-100/5 - Tubular Structure - Corrosion Proofing\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-100/5 Tubular Structure - Corrosion Proofing 8/68\n\nApplicability: All models with S/Nos. 012 to 085. Document:  Aero Commander Model 100 SB 1004. 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1968 (Issue 8/68) addressing a specific maintenance requirement. It has not expanded beyond its original purpose of mandating corrosion proofing for a limited fleet of aircraft."},"complexity_factors":["Extremely short document (approximately 100 words)","No defined terms section","No cross-references to other legislation beyond a single service bulletin citation","No conditional logic or exceptions","Single, unambiguous compliance requirement ('Forthwith')","Narrow applicability (specific aircraft models and serial number range)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that requires specific maintenance action on certain aircraft.\n\n**What it does:** It orders immediate action to address **corrosion proofing** (protecting against rust and deterioration) of the **tubular structure** (the metal tube framework) on specific light aircraft.\n\n**Who it affects:** Owners and operators of **S.L. Industries Commander 100 Series and Volair 10 Series aeroplanes** with **serial numbers 012 to 085**.\n\n**What must be done:** Operators must follow the procedures in **Aero Commander Service Bulletin 1004** immediately (\"forthwith\" means without delay).\n\n**Why it matters:** Corrosion in tubular airframe structures can weaken the aircraft's skeleton, potentially leading to structural failure. This AD ensures these specific aircraft receive protective treatment to prevent dangerous corrosion before it becomes a safety hazard."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD text states applicability as all models with serial numbers 012 to 085 and mandates compliance forthwith. The document itself contains no indication that the scope has been altered from any prior version; there is no text in this instrument showing an expansion or narrowing of applicability or obligations."},"complexity_factors":["Very short AD text with clear, narrow applicability (S/Nos. 012–085) — lowers complexity.","Directive refers to an external technical document (Aero Commander Model 100 SB 1004) for required work — adds complexity by dependency on another instrument.","Immediate compliance term ('Forthwith') reduces scheduling discretion and raises operational urgency.","Lack of technical detail in the AD itself forces operators to obtain and interpret the service bulletin, creating procedural and verification steps.","Regulatory enforcement and operational implications (possible grounding/downtime) introduce implementation and logistical complexity for operators."],"plain_english_summary":"Owners and operators of S.L. Industries Commander 100 and Volair 10 aeroplanes (S/Ns 012–085) must immediately carry out corrosion‑proofing of the tubular structure as mandated by the Civil Aviation Safety Authority. Compliance is mandatory “forthwith” by following Aero Commander Model 100 SB 1004; operators bear the cost, arrange maintenance, and may face downtime or operational restrictions until work is done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing","history":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing/history","analysis":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing/analysis","conflicts":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing/conflicts","importantCases":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing/important-cases","documents":"/api/acts/ad-ac-100-5-tubular-structure-corrosion-proofing/documents"}}