{"id":"F2006B02170","name":"AD/AC-100/18 - Nose Landing Gear Steering Rod - Modification","slug":"ad-ac-100-18-nose-landing-gear-steering-rod-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41400,"registerId":"commonwealth-F2006B02170-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-100/18 - Nose Landing Gear Steering Rod - Modification","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 4/1973,Aircraft below 5700 kg,S.L. Industries Commander 100 Series and Volair 10 Series Aeroplanes,Nose Landing Gear Steering Rod - Modification,18\ntitle: Airworthiness Directive - AD/AC-100/18 - Nose Landing Gear Steering Rod - Modification\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-100/18 Nose Landing Gear Steering Rod - Modification 4/73\n\nApplicability: All models with S/Nos. 026 to 360 and 5001 to 5181. Document:  Aero Commander SL No. S-1024.\n\nCompliance: For aircraft which have exceeded 200 hours’ time in service as at 30 April 1973 - within 100 hours’ time in service after 30 April 1973. For all other aircraft - prior to achieving 300 hours’ time in service.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2213},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive retains its original narrow, technical scope targeting a specific structural modification for defined aircraft models. No evidence of scope expansion beyond the original landing gear safety mandate."},"complexity_factors":["Single, discrete mechanical modification requirement","Two-tier compliance deadline based on accumulated flight hours (time in service)","Narrow applicability limited to specific aircraft serial number ranges","Reference to external technical document (Service Letter S-1024) for implementation details rather than self-contained instructions"],"plain_english_summary":"This Airworthiness Directive mandates a mechanical modification to the nose landing gear steering rod, performed per Aero Commander Service Letter S-1024, to keep affected aeroplanes airworthy. It applies to S.L. Industries Commander 100 Series and Volair 10 Series with serial numbers 026–360 and 5001–5181.\n\nThe fix must be completed within specified flight‑hour deadlines and is compulsory: flying without it violates aviation law and risks nose‑gear steering failure during taxi, takeoff, or landing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification","history":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification/history","analysis":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification/analysis","conflicts":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification/conflicts","importantCases":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification/important-cases","documents":"/api/acts/ad-ac-100-18-nose-landing-gear-steering-rod-modification/documents"}}