{"id":"F2006B08666","name":"AD/CRESCO/8 - Horizontal Stabiliser Main Spar Top Cap","slug":"ad-cresco-8-horizontal-stabiliser-main-spar-top-cap","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51757,"registerId":"commonwealth-F2006B08666-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\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 CASR 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\nPacific Aerospace Corporation Cresco Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CRESCO/8 Horizontal Stabiliser Main S","sectionType":"part","heading":"AD/CRESCO/8 Horizontal Stabiliser Main Spar Top Cap 8/2004","content":"# AD/CRESCO/8 Horizontal Stabiliser Main Spar Top Cap 8/2004\n\nApplicability: All Cresco 08-600 aircraft.\n\nRequirement: Inspect in accordance with Pacific Aerospace Service Bulletin PACSB/CR/032.\n\nIf the spar top cap is found cracked, replace the spar cap before further flight.\n\nNote: NZ CAA AD DCA/CRESCO/4 refers.\n\nCompliance: Unless the initial inspection is already accomplished, inspect at 2,500 hours total time in service or within 100 hours after 5 August 2004, whichever occurs later. Inspect thereafter at intervals not to exceed 100 hours time in service.\n\nThis Airworthiness Directive becomes effective on 5 August 2004.\n\nBackground: Cracking of a horizontal stabiliser main spar top cap has occurred in service.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 25 June 2004\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1702},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope addressing a specific unsafe condition (cracking of the horizontal stabiliser main spar top cap) on a specific aircraft type. There is no evidence of scope expansion beyond the original safety-critical maintenance requirement."},"complexity_factors":["Extremely short length (single page)","Limited to one specific aircraft model (Cresco 08-600)","Simple binary compliance path (cracked = replace, not cracked = continue)","Minimal cross-referencing (only one service bulletin and one foreign directive)","No nested exceptions, conditional clauses, or defined terms sections"],"plain_english_summary":"CASA has issued a mandatory Airworthiness Directive requiring owners/operators of Pacific Aerospace Cresco 08-600 aeroplanes to inspect the top cap of the main spar in the horizontal stabiliser per PACSB/CR/032 and to replace the spar cap before flight if any cracks are found.\n\nThe first inspection is due by 2,500 total flight hours or within 100 hours after 5 August 2004, then every 100 hours thereafter; the AD responds to real-world cracks that could lead to loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap","history":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap/history","analysis":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap/analysis","conflicts":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap/conflicts","importantCases":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap/important-cases","documents":"/api/acts/ad-cresco-8-horizontal-stabiliser-main-spar-top-cap/documents"}}