{"id":"F2006B02134","name":"AD/AC/74 Amdt 2 - Fairleads On Aft Fuselage Frames - Installation","slug":"ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41364,"registerId":"commonwealth-F2006B02134-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/74 Amdt 2 - Fairleads On Aft Fuselage Frames - Installation","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 10/1981,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Fairleads On Aft Fuselage Frames - Installation,74 Amdt 2\ntitle: Airworthiness Directive - AD/AC/74 Amdt 2 - Fairleads On Aft Fuselage Frames - Installation\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/74\n\nAmdt 2\n\n\nFairleads On Aft Fuselage Frames - Installation 10/81\n\n \n\nApplicability: All models 690A & 690B with S/Nos. 11100 to 11566.\n\n \n\nAll models 690C with S/Nos. 11600 to 11647. All models 695 with S/Nos. 95000 to 95033.\n\nDocument: Gulfstream American Commander Division S.B. No. 181B.\n\nNote: Aeroplanes which have been modified to S.B. Nos. 181 or 181A may require additional work to comply with S.B. No. 181B.\n\nCompliance: With 100 hours’ time in service after 31 October 1981.\n\n \n\nBackground: Revision “B” of S.B. No. 181 requires additional work to be performed on some aeroplanes which were modified to previous issues of S.B. No. 181.\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":1584},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment expands the original directive to require additional work on aircraft previously modified under Service Bulletin Nos. 181 or 181A, ensuring compliance with the updated Service Bulletin 181B standard rather than just the original installation requirement."},"complexity_factors":["Narrow applicability criteria requiring specific serial number verification across four aircraft models","Dependency on external technical document (Service Bulletin 181B) not reproduced in the directive","Conditional compliance pathway for aircraft previously modified under earlier service bulletins","Technical terminology requiring aviation maintenance knowledge (fairleads, time in service, fuselage frames)"],"plain_english_summary":"This is a **safety maintenance order** for specific **Twin Commander aircraft** (models 690A, 690B, 690C, and 695 with particular serial numbers).\n\n**What it requires:**\nOwners must install or modify **fairleads** (protective cable guides where wiring passes through metal frames) on the rear fuselage frames, following the manufacturer's **Service Bulletin No. 181B**.\n\n**Who must comply:**\n- Models 690A and 690B with serial numbers 11100 to 11566\n- Model 690C with serial numbers 11600 to 11647\n- Model 695 with serial numbers 95000 to 95033\n\n**Deadline:**\nThe work must be completed within **100 hours of flight time** after 31 October 1981.\n\n**Important catch-up:**\nIf your aircraft was already modified under earlier versions of this bulletin (Nos. 181 or 181A), you may need **extra work** to meet the updated \"Revision B\" standard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation","history":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation/history","analysis":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation/analysis","conflicts":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation/conflicts","importantCases":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation/important-cases","documents":"/api/acts/ad-ac-74-amdt-2-fairleads-on-aft-fuselage-frames-installation/documents"}}