{"id":"F2006B11234","name":"AD/M20/28 - Automatic Pilot Control Wheel Disengage Switch Circuit - Modification","slug":"ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56954,"registerId":"commonwealth-F2006B11234-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/M20/28 - Automatic Pilot Control Wheel Disengage Switch Circuit - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\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)  Mooney M20 Series Aeroplanes\n\n \n\nAD/M20/28 Automatic Pilot Control Wheel Disengage\n\nSwitch Circuit - Modification\n\n\n7/77\n\n \n\nApplicability: Model M20J with S/Nos. 24-0063, 24-0068, 24-0077, 24-0080 24-0084, 24-0088, 24-\n\n0091 and 24-0093.\n\n \n\nDocument:  Mooney SB M20-199. Compliance: Before 30 September 1977.\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\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":1552},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope — mandating a specific safety modification to address a defect in the autopilot disengage circuit for the identified aircraft only."},"complexity_factors":["Single mandatory action with no exceptions or conditional provisions","Applicability limited to only eight specific aircraft identified by serial number","No defined terms or interpretation sections","No cross-references to other legislative provisions beyond the enabling regulations"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:** Requires owners or operators of specific Mooney M20J aeroplanes to modify the automatic pilot (autopilot) control wheel disengage switch circuit.\n\n**Why it matters:** This fixes a safety defect that could prevent the autopilot from disconnecting when the pilot tries to manually override it via the control wheel. Ensuring the pilot can immediately take manual control is critical for flight safety.\n\n**Who is affected:** Only the owners of eight specific aircraft identified by serial numbers: 24-0063, 24-0068, 24-0077, 24-0080, 24-0084, 24-0088, 24-0091 and 24-0093.\n\n**What must be done:** The modification must be performed exactly as described in **Mooney Service Bulletin M20-199** (a technical instruction manual from the aircraft manufacturer)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification","history":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification/history","analysis":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification/analysis","conflicts":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification/conflicts","importantCases":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification/important-cases","documents":"/api/acts/ad-m20-28-automatic-pilot-control-wheel-disengage-switch-circuit-modification/documents"}}