{"id":"F2006B11224","name":"AD/M20/17 Amdt 1 - Elevator Trim Tubes","slug":"ad-m20-17-amdt-1-elevator-trim-tubes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56942,"registerId":"commonwealth-F2006B11224-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/M20/17 Amdt 1 - Elevator Trim Tubes","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/M20/17\n\nAmdt 1\n\n\nElevator Trim Tubes 11/95\n\n \n\nApplicability: M20 models with serial numbers as listed in the Requirement Document. Requirement:              Action in accordance with Aerostar Service Bulletin M20-185.\n\nCompliance: Within 100 hours time in service after 31 October 1972.\n\n \n\nThe Compliance of the initial issue of this Directive remains unchanged. This Amendment is effective from 12 October 1995.\n\n \n\nBackground: This amendment changes the applicability to refer only to those aircraft affected.\n\n \n\nThe initial issue provided advice from the manufacturer that aircraft utilising nylon grommet bearings in the trim tube support structure require inspection.\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":1636},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 narrows the applicability from the initial issue to refer only to those specific aircraft serial numbers actually affected by the nylon grommet bearing defect, rather than potentially applying to all Mooney M20 models."},"complexity_factors":["Single specific requirement referencing external technical document (Aerostar Service Bulletin M20-185)","Applicability determined by serial numbers listed in separate Requirement Document not provided in the text","Technical aviation terminology (time in service, elevator trim tubes, grommet bearings)"],"plain_english_summary":"**What this does:** This directive requires owners and operators of certain Mooney M20 aircraft to inspect their **elevator trim tubes** (the mechanical components that adjust the aircraft's pitch trim) to check for issues with nylon grommet bearings in the support structure.\n\n**Who it affects:** Owners and operators of specific Mooney M20 model aircraft identified by serial number in a separate Requirement Document.\n\n**What you must do:** Follow the inspection or maintenance instructions outlined in **Aerostar Service Bulletin M20-185** within 100 hours of flying time after 31 October 1972.\n\n**Why it matters:** The nylon grommet bearings in the trim tube support structure can develop faults that affect flight safety. This amendment (from October 1995) updates the original directive to clarify that it only applies to aircraft actually affected by this specific bearing issue, rather than all M20 models."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes","history":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes/history","analysis":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes/analysis","conflicts":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes/conflicts","importantCases":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes/important-cases","documents":"/api/acts/ad-m20-17-amdt-1-elevator-trim-tubes/documents"}}