{"id":"F2006B02233","name":"AD/AKRO/1 Amdt 1 - Airspeed Restriction","slug":"ad-akro-1-amdt-1-airspeed-restriction","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41463,"registerId":"commonwealth-F2006B02233-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AKRO/1 Amdt 1 - Airspeed Restriction","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 9/1985,Aircraft below 5700 kg,Stephens Akro Series Aeroplanes,Airspeed Restriction,1 Amdt 1\ntitle: Airworthiness Directive - AD/AKRO/1 Amdt 1 - Airspeed Restriction\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)  Stephens Akro Series Aeroplanes\n\n \n\n# AD/AKRO/1\n\nAmdt 1\n\nApplicability: All models.\n\n# Airspeed Restriction 9/85\n\n \n\nRequirement: Limit VNE speed to 139 knots IAS by installing a placard adjacent to the airspeed indicator with the legend:\n\n \n\nVNE (never exceed) 139 knots IAS.\n\n \n\nThis Requirement will lapse when the aircraft has been modified in accordance with a scheme approved by the Secretary.\n\n \n\nCompliance: Before further flight after 7 October 1982.\n\n \n\nBackground: Amendment 1 allows for approved modifications to the aileron mass balance and to the wing attachments that will permit restoration of the original flight envelope.\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":1351},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the original directive by introducing a compliance pathway that allows the speed restriction to be removed through approved modifications to the aileron mass balance and wing attachments. The original directive likely imposed a permanent restriction without this remediation option."},"complexity_factors":["Single operational requirement (placard installation and speed limit)","No defined terms section or interpretive provisions","Minimal cross-referencing (only standard reference to Civil Aviation Regulations Part 39)","Document length under 150 words","No conditional logic, exceptions, or subordinate calculations"],"plain_english_summary":"This is a **safety directive** for owners and operators of **Stephens Akro series aeroplanes** (light aerobatic aircraft).\n\n**What it requires:**\n- Install a warning placard (sticker) next to the airspeed gauge displaying: *\"VNE (never exceed) 139 knots IAS\"*\n- This limits the maximum speed to 139 knots (Indicated Airspeed)\n- Must be completed before flying the aircraft after 7 October 1982\n\n**Why it matters:**\nThe speed restriction addresses safety concerns regarding the aircraft's aileron mass balance and wing attachments. Flying faster than 139 knots could risk structural failure or loss of control.\n\n**The fix:**\nThis restriction is temporary. Owners can remove the speed limit by modifying the aircraft according to a scheme approved by the Secretary (aviation authority). This amendment specifically permits modifications to the aileron mass balance and wing attachments that restore the aircraft's original safe flight capabilities."}},"importantCases":[],"_links":{"self":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction","history":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction/history","analysis":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction/analysis","conflicts":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction/conflicts","importantCases":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction/important-cases","documents":"/api/acts/ad-akro-1-amdt-1-airspeed-restriction/documents"}}