{"id":"F2006B02127","name":"AD/AC/68 - Elevator Bungee Springs - Inspection","slug":"ad-ac-68-elevator-bungee-springs-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41357,"registerId":"commonwealth-F2006B02127-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/68 - Elevator Bungee Springs - Inspection","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 9/1978,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Elevator Bungee Springs - Inspection,68\ntitle: Airworthiness Directive - AD/AC/68 - Elevator Bungee Springs - Inspection\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/68 Elevator Bungee Springs - Inspection 9/78\n\nApplicability: All Rockwell Commander twin engine aeroplanes with S/Nos. 1 to 1876; All model 500S with S/Nos. 3050 to 3099; and\n\n \n\nAll model 681 with S/Nos. 6001 to 6060.\n\n \n\nDocument: Rockwell International SL No. 225A.\n\n \n\nCompliance: Within 100 hours’ time in service after 30 September 1978.\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":1356},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope as a specific safety inspection requirement for elevator bungee springs on defined Twin Commander aircraft models. No expansion beyond this original mechanical safety purpose is evident."},"complexity_factors":["Single, unambiguous compliance action (inspection only)","Narrow applicability limited to specific aircraft models and serial number ranges","No defined terms, cross-references to other legislation, or conditional exceptions","Clear deadline based on flight hours rather than complex triggering events"],"plain_english_summary":"This Airworthiness Directive (AD) requires owners and operators of specific Twin Commander aircraft to inspect the **elevator bungee springs** — components that help centre and provide feel to the elevator (tailplane) controls — to ensure they are in safe working condition.\n\n**Who it affects:**\n- Owners of Rockwell Commander twin-engine aeroplanes with serial numbers 1 to 1876\n- Owners of model 500S aeroplanes with serial numbers 3050 to 3099\n- Owners of model 681 aeroplanes with serial numbers 6001 to 6060\n\n**What you must do:**\nComplete an inspection of the elevator bungee springs within 100 hours of flight time after 30 September 1978, following the procedures set out in Rockwell International Service Letter No. 225A.\n\n**Why it matters:**\nThe directive addresses potential failures in these springs that could impair elevator control, posing a safety risk during flight. Compliance ensures the aircraft remains airworthy and safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection","history":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection/history","analysis":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection/analysis","conflicts":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection/conflicts","importantCases":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection/important-cases","documents":"/api/acts/ad-ac-68-elevator-bungee-springs-inspection/documents"}}