{"id":"F2006B06657","name":"AD/ROTAX/10 - Crack Inspection","slug":"ad-rotax-10-crack-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48592,"registerId":"commonwealth-F2006B06657-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","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\nRotax Piston Engines","sortOrder":0},{"sectionNumber":"AD/ROTAX/10 Crack Inspection 11/2001","sectionType":"part","heading":"AD/ROTAX/10 Crack Inspection 11/2001","content":"# AD/ROTAX/10 Crack Inspection 11/2001\n\nApplicability: Rotax 914 F series engines. Requirement: Inspect the following:\n\n    Crankcase in accordance with Rotax Service Bulletin SB-914-018; and\n\n    2. Engine suspension frame in accordance with Rotax Service Bulletin SB-914-016; and\n\n    3. The exhaust bend in accordance with Rotax Service Bulletin SB-914-017.\n\nNote: Austrian AD No. 103 refers.\n\nCompliance: Unless previously accomplished, within 10 hours time in service and thereafter, for Requirements 1 and 2, at intervals not to exceed 110 hours, and for Requirement 3, at intervals not to exceed 55 hours.\n\nThis Airworthiness Directive becomes effective on 1 November 2001.\n\nBackground: This Directive has been issued to require inspection of certain engine parts for cracks.\n\nThe requirement follows reports of cracks found in Rotax 914F powered Diamond HK36 sailplanes. The defects are not considered to be limited to Diamond aircraft.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 13 September 2001\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument, as published, applies specifically to Rotax 914 F series engines and lists three parts to be inspected with specified intervals and an effective date. Nothing in the text indicates a change or expansion of scope from that stated purpose; the Background explains the catalyst (crack reports) and the Requirement and Compliance sections define the scope and timing."},"complexity_factors":["Cross-reference to external Rotax Service Bulletins for inspection procedures (Requirement)","Different recurring intervals for different components (110 hours vs 55 hours) (Compliance)","Technical inspection and potential repair work required, implying skilled labour and parts","Legal basis under CASR subregulation 39.1(1) giving regulator discretion to issue the AD (header/signature)","Note referencing an overseas (Austrian) AD creates an international cross-reference (Note/Background)","Short compliance window to first inspection (within 10 hours TIS) increases operational disruption risk"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of aircraft fitted with Rotax 914 F series engines to inspect the crankcase, engine suspension frame and exhaust bend using the specified Rotax Service Bulletins to detect cracks (Requirement; Applicability). Inspections must start within 10 hours time‑in‑service and then recur — 110‑hour intervals for crankcase/frame and 55‑hour intervals for the exhaust (Compliance). CASA (the delegate signing the AD) mandates and enforces the inspections; operators pay for and arrange the work."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with focused, original scope. It addresses a specific safety issue (crack inspection) for a specific engine series, which is exactly what airworthiness directives are designed to do. No scope creep is evident."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined requirements with clear cross-references to manufacturer service bulletins","Simple conditional logic: 'unless previously accomplished' is the only exception","Straightforward compliance schedule with fixed time intervals","No nested definitions or interpretive sections","Single applicability criterion (Rotax 914 F series engines)"],"plain_english_summary":"CASA has issued a mandatory safety order requiring owners/operators of Rotax 914 F series engines to inspect the crankcase, engine suspension frame and exhaust bend for cracks using Rotax Service Bulletins SB‑914‑016/017/018. Initial checks are within 10 flight hours, then repetitive inspections (crankcase & frame every 110 hours; exhaust bend every 55 hours).  \n\nIssued after crack findings on Diamond HK36 sailplanes, the directive aims to prevent engine failure and accidents. Effective 1 November 2001."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-rotax-10-crack-inspection","history":"/api/acts/ad-rotax-10-crack-inspection/history","analysis":"/api/acts/ad-rotax-10-crack-inspection/analysis","conflicts":"/api/acts/ad-rotax-10-crack-inspection/conflicts","importantCases":"/api/acts/ad-rotax-10-crack-inspection/important-cases","documents":"/api/acts/ad-rotax-10-crack-inspection/documents"}}