{"id":"F2006B04893","name":"AD/CERES/4 Amdt 1 - Mixture Control Lever Quadrant - Modification","slug":"ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44704,"registerId":"commonwealth-F2006B04893-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CERES/4 Amdt 1 - Mixture Control Lever Quadrant - Modification","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)  \nC.A.C. CA-28 (Ceres) Series Aeroplanes\n\nAD/CERES/4\n\nAmdt 1\n\n  \nMixture Control Lever Quadrant \\- Modification 9/99\n\nApplicability: All models.\n\nRequirement: Mark or remark the mixture control lever quadrant to indicate clearly the following positions:\n\n    (a) The minimum lean position \\- to be designated “LEAN”.\n\n    (b) The rearmost position \\- to be designated “CUT OFF”.\n\nThis minimum lean position of the mixture control lever is the rearmost position it can reach without operating the idle cut off valve.\n\nNote: Modifications performed in accordance with AD/CA-28/4 satisfy the requirements of this Directive.\n\nCompliance: Forthwith.\n\nThis Amendment becomes effective on 9 September 1999.\n\nBackground The original issue of this Airworthiness Directive became effective in Issue AL 2/64.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2457},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This amendment updates the original 1964 directive (Issue AL 2/64) but maintains the identical scope: ensuring clear labeling of mixture control positions on Ceres aircraft. It does not expand applicability to new aircraft types or introduce new categories of requirements."},"complexity_factors":["Single substantive requirement (applying two labels to a control lever)","No interpretation section or specialized defined terms","No conditional exceptions, nested logic, or cross-references to other legislative provisions","Document length is less than one page","Immediate compliance with no complex timing calculations"],"plain_english_summary":"This Airworthiness Directive from the Civil Aviation Safety Authority requires owners/operators of all C.A.C. CA-28 (Ceres) aeroplanes to immediately fit clear quadrant labels on the mixture control lever: marking the minimum-fuel position “LEAN” and the fuel-shutoff position “CUT OFF” to prevent engine operation errors. Compliance is immediate; aircraft already modified under AD/CA-28/4 are compliant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification","history":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification/history","analysis":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification/analysis","conflicts":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification/conflicts","importantCases":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification/important-cases","documents":"/api/acts/ad-ceres-4-amdt-1-mixture-control-lever-quadrant-modification/documents"}}