{"id":"F2006B02104","name":"AD/AC/45 - Nose Wheel Tyre - Inspection and Replacement","slug":"ad-ac-45-nose-wheel-tyre-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41334,"registerId":"commonwealth-F2006B02104-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/45 - Nose Wheel Tyre - Inspection and Replacement","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 5/1971,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Nose Wheel Tyre - Inspection and Replacement,45\ntitle: Airworthiness Directive - AD/AC/45 - Nose Wheel Tyre - Inspection and Replacement\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/45 Nose Wheel Tyre - Inspection and Replacement 5/71\n\nApplicability: All models except models 520 and 680T and V equipped with 16 x 4.4 nose wheel tyre (200 mph).\n\n \n\nDocument: Aero Commander SB No. 103A.\n\n \n\nCompliance: Within 50 hours’ time in service after 13 May 1971.\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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2526},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is the original 1971 directive (Issue 5/71) and maintains its original narrow technical scope addressing nose wheel tyre safety on specified Twin Commander aircraft models."},"complexity_factors":["Extremely short length (single compliance requirement)","Single exclusion clause in applicability section (three specific model/tyre combinations)","Reference to only one external technical document (Service Bulletin No. 103A)","No defined terms, interpretation section, or internal cross-references","Simple temporal compliance trigger (50 hours time in service after specific date)"],"plain_english_summary":"This is a mandatory aviation safety order requiring specific aircraft owners to check and replace nose wheel tyres (the front landing gear tyres) on certain Twin Commander planes.\n\n**Who it affects:** Owners and operators of Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) series aircraft. **Exception:** Models 520 and 680T/V that use 16 x 4.4 inch nose wheel tyres rated for 200 mph are excluded.\n\n**What must be done:** Inspect and replace the nose wheel tyres following Aero Commander Service Bulletin No. 103A within 50 hours of flight time after 13 May 1971.\n\n**Why it matters:** This prevents dangerous tyre failures during takeoff, landing, or taxiing by ensuring worn or defective nose wheel tyres are replaced."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement","history":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement/history","analysis":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement/important-cases","documents":"/api/acts/ad-ac-45-nose-wheel-tyre-inspection-and-replacement/documents"}}