{"id":"F2006B04247","name":"AD/BEECH 90/59 - Elevator Control Horn Attachment - Modification","slug":"ad-beech-90-59-elevator-control-horn-attachment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44028,"registerId":"commonwealth-F2006B04247-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/59 - Elevator Control Horn Attachment - 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)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\n# AD/BEECH 90/59  Elevator Control Horn Attachment - Modification\n\nApplicability: All model F90 with S/Nos. LA-2 to LA-43. Document:  Beechcraft SI No. 1111 Rev. 1.\n\n# 5/81\n\nCompliance: Unless already accomplished, within 100 hours’ time in service after 31 May 1981.\n\n \n\nBackground:  The installation of additional rivets in the elevator control horn attachments has been found necessary, under service conditions, to prevent looseness developing in this control connection.\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":1888},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original targeted scope: addressing a specific mechanical defect (looseness in elevator control horn attachments) in a narrowly defined aircraft type. There is no evidence of expansion beyond this original airworthiness safety purpose."},"complexity_factors":["Single, specific operative requirement","Narrow applicability limited to specific aircraft model and serial number range","Incorporation by reference of external technical standard (Beechcraft SI No. 1111)","No exceptions, exemptions, or conditional logic","Short length (single page)"],"plain_english_summary":"**What this does:** This directive mandates a safety modification for specific Beechcraft King Air aircraft. Owners must install additional rivets in the elevator control horn attachments to prevent the control connection from becoming loose.\n\n**Who it affects:** Operators of Beechcraft Model F90 aircraft with serial numbers LA-2 through LA-43.\n\n**Why it matters:** A loose elevator control horn attachment could compromise the pilot's ability to control the aircraft's pitch. The modification must be completed within 100 flight hours after 31 May 1981 (unless already accomplished).\n\n**How to comply:** The directive references **Beechcraft Service Instruction No. 1111 Rev. 1**, which contains the specific technical procedure for installing the rivets."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification","history":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification/history","analysis":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification/analysis","conflicts":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification/conflicts","importantCases":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification/important-cases","documents":"/api/acts/ad-beech-90-59-elevator-control-horn-attachment-modification/documents"}}