{"id":"F2006B02070","name":"AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - Modification","slug":"ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41300,"registerId":"commonwealth-F2006B02070-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - 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 NK,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Flap Pulley Assembly Right Inboard Station 13.625 - Modification,11\ntitle: Airworthiness Directive - AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - 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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/11 Flap Pulley Assembly Right Inboard NK\n\nStation 13.625 - Modification\n\nApplicability: All models: S/Nos. 231 to 710. Document: Aero Commander SB No. 55. Compliance:               Forthwith.\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":1394},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope, targeting only the specific flap pulley assembly modification for identified Twin Commander aircraft models. There is no evidence of scope creep or expansion beyond the original safety issue."},"complexity_factors":["Extremely brief directive (less than 150 words of substantive content)","Single, clear applicability criterion (aircraft serial numbers 231-710)","Only one referenced technical document (Service Bulletin No. 55)","Unambiguous compliance timeframe ('Forthwith' means immediately)","No defined terms, cross-references, or conditional exceptions"],"plain_english_summary":"**What this is:** A mandatory safety direction (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) that requires immediate action on specific aircraft.\n\n**Who it affects:** Owners and operators of Twin Commander aeroplanes (models 500, 600 and 700 series) with serial numbers 231 through 710. These aircraft are also known as Gulfstream/Rockwell/Aerocommander models.\n\n**What you must do:** Modify the **right inboard flap pulley assembly** located at **Station 13.625** (a specific point on the aircraft's structure) by following the manufacturer's instructions in **Aero Commander Service Bulletin No. 55**.\n\n**When:** **Forthwith** — meaning immediately, before the aircraft flies again.\n\n**Why it matters:** This modification addresses a specific airworthiness issue with the flap system (the flaps are the surfaces on the wings that help control lift during takeoff and landing). The directive ensures the aircraft remains safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification","history":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification/history","analysis":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification/analysis","conflicts":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification/conflicts","importantCases":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification/important-cases","documents":"/api/acts/ad-ac-11-flap-pulley-assembly-right-inboard-station-13-625-modification/documents"}}