{"id":"F2006B09675","name":"AD/F27/106 - Elevator: Inboard Trim Tab Hinge Bracket and Control Bracket - Inspection","slug":"ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115813,"registerId":"commonwealth-F2006B09675-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/106 - Elevator: Inboard Trim Tab Hinge Bracket and Control Bracket - Inspection","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)  Fokker F27 Series Aeroplanes\n\n \n\n# AD/F27/106 Elevator: Inboard Trim Tab Hinge Bracket\n\nand Control Bracket - Inspection\n\nApplicability: As detailed in requirement document. Document:  Fokker SB F27/55-56.\n\nCompliance: Before 1st July 1982.\n\n# 4/82\n\n \n\nBackground: Manufacturers reports of severe damage to the elevator and elevator trim tab after excessive vibration in flight. The probable cause was determined to be installation stresses during incorporation of SB F27/55-31.\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":2220},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: addressing a specific airworthiness safety issue (vibration damage to elevator components) on a specific aircraft type through a mandated inspection protocol."},"complexity_factors":["Directs to external technical document (Fokker SB F27/55-56) for detailed inspection procedures rather than spelling them out in the instrument itself","Single, discrete compliance action with no conditional exceptions or nested requirements","Minimal interpretation section with no defined terms"],"plain_english_summary":"**What this does:** This directive requires operators of Fokker F27 aircraft to inspect two specific parts of the elevator — the inboard trim tab hinge bracket and the control bracket.\n\n**Who it affects:** Anyone operating or maintaining Fokker F27 series aircraft.\n\n**Why it matters:** Reports indicated that installation stresses (from previous maintenance work) were causing severe vibration and damage to these brackets during flight. This inspection checks for that damage to prevent potential loss of aircraft control or structural failure.\n\n**How to comply:** The inspection must be carried out exactly as described in **Fokker Service Bulletin F27/55-56** (a technical manual from the aircraft manufacturer)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection","history":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection/history","analysis":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection/analysis","conflicts":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection/conflicts","importantCases":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection/important-cases","documents":"/api/acts/ad-f27-106-elevator-inboard-trim-tab-hinge-bracket-and-control-bracket-inspection/documents"}}