{"id":"F2006B02139","name":"AD/AC/79 Amdt 2 - Rudder Control Cable Fraying","slug":"ad-ac-79-amdt-2-rudder-control-cable-fraying","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41369,"registerId":"commonwealth-F2006B02139-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/79 Amdt 2 - Rudder Control Cable Fraying","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nTwin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\nAD/AC/79\n\nAmdt 2\n\n  \nRudder Control Cable Fraying 11/85\n\nApplicability: The following models with 200 hours or more time in service: Models 685 with S/Nos. 12000 to 12066.\n\nModels 690 with S/Nos. 11001 to 11079. Models 690A with S/Nos. 11100 to 11344\\. Models 690B with S/Nos. 11350 to 11566\\. Models 690C with S/Nos. 11600 to 11731\\. Models 695 with S/Nos. 95000 to 95084.\n\nModels 690D with S/Nos. 15001 to 15025 and 15029 to 15032.\n\nModels 695A with S/Nos. 96001 to 96055, 96059 to 96061, 96064, 96065 & 96072.\n\nRequirement: Action in accordance with Gulfstream Aerospace SB No. 195B.\n\nCompliance: Unless already accomplished, within 25 hours’ time in service after 30 November 1985 and thereafter at intervals not exceeding 100 hours’ time in service until service information No. SI- 199 has been complied with.\n\nBackground: This Directive is amended to revise aircraft applicability.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1386},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment expands the directive's coverage to additional aircraft serial numbers. The background explicitly states the directive is amended to 'revise aircraft applicability,' indicating the scope has been broadened from previous versions to capture more aircraft potentially affected by the same safety defect."},"complexity_factors":["Extensive enumeration of specific aircraft serial numbers (17 distinct ranges across 8 model variants)","Dependency on external technical documents not contained in the directive itself (Service Bulletin 195B and Service Information SI-199)","Time-in-service calculation requirements for both applicability (200-hour threshold) and compliance intervals","Conditional compliance endpoint (continues until SI-199 is accomplished)"],"plain_english_summary":"Owners/operators of certain Twin Commander 500/600/700-series airplanes (specific serial-numbered 685–695 variants with ≥200 flight hours) must inspect rudder control cables per Gulfstream Service Bulletin No. 195B.  \n\nThe directive aims to detect fraying that could cause cable failure and loss of directional control, preventing potentially catastrophic accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying","history":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying/history","analysis":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying/analysis","conflicts":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying/conflicts","importantCases":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying/important-cases","documents":"/api/acts/ad-ac-79-amdt-2-rudder-control-cable-fraying/documents"}}