{"id":"F2006B10008","name":"AD/FU24/62 - Forward Fin Structure","slug":"ad-fu24-62-forward-fin-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55366,"registerId":"commonwealth-F2006B10008-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nAirparts (NZ) Ltd. FU 24 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/FU24/62 Forward Fin Structure 6/2002 ","sectionType":"part","heading":"AD/FU24/62 Forward Fin Structure 6/2002 DM","content":"# AD/FU24/62 Forward Fin Structure 6/2002 DM\n\nApplicability: All Model FU24, FU24A, \\-950, \\-950M, and \\-954.\n\nRequirement: Referring to Figure 1, perform a detailed visual inspection of the forward area at the base of the fin for cracks. Pay particular attention to the skin in the area of the rivets that join the fin skin to bulkhead part number 242305, and aft to the first vertical lap joint. Inspect from the bottom of the fin up to the first external strap. To accomplish this inspection, any rubber abrasion protection that is fitted in this area, including any sealant, must be removed. The fin leading edge fairing, part number 242321, must also be removed.\n\nIf any structure is found cracked, repair before further flight.\n\n![](image.002.jpeg)  \n\nFigure 1\n\nNote: NZ CAA Emergency AD DCA/FU24/173 refers.\n\nCompliance: Before 8 May 2002.\n\nThis Airworthiness Directive becomes effective on 1 May 2002.","sortOrder":1}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2298},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope, targeting a specific structural inspection for a defined aircraft series in response to a specific unsafe condition. No evidence of scope expansion beyond the original safety concern regarding the forward fin structure."},"complexity_factors":["Single, discrete operative requirement (one inspection task)","Minimal cross-referencing (only one reference to NZ CAA Emergency AD)","No nested conditional logic or exceptions","Specific but narrow applicability (limited to one aircraft series)","Short length with clear, action-oriented language"],"plain_english_summary":"Owners and operators of Airparts (NZ) FU24 series aeroplanes must comply with a mandatory CASA Airworthiness Directive requiring a detailed inspection of the forward base of the vertical fin to check for cracking around the fin-to-bulkhead rivet area. Access coverings and fairing must be removed to expose the area.\n\nAny crack found grounds the aircraft until repaired. The inspection must be completed by 8 May 2002 to address a potential tail-structure failure risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-62-forward-fin-structure","history":"/api/acts/ad-fu24-62-forward-fin-structure/history","analysis":"/api/acts/ad-fu24-62-forward-fin-structure/analysis","conflicts":"/api/acts/ad-fu24-62-forward-fin-structure/conflicts","importantCases":"/api/acts/ad-fu24-62-forward-fin-structure/important-cases","documents":"/api/acts/ad-fu24-62-forward-fin-structure/documents"}}