{"id":"F2006B06660","name":"AD/ROTAX/13 - Mixture Enrichment Jet","slug":"ad-rotax-13-mixture-enrichment-jet","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48602,"registerId":"commonwealth-F2006B06660-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/13 Mixture Enrichment Jet 12/20","sectionType":"part","heading":"AD/ROTAX/13 Mixture Enrichment Jet 12/2003","content":"# AD/ROTAX/13 Mixture Enrichment Jet 12/2003\n\nApplicability: Rotax 914 F series engines. Serial Numbers 4.420.002 up to 4.420.029 and 4.420.032 up to 4.420.044.\n\nRequirement: Verify the calibration of the mixture enrichment jet in accordance with Bombardier Technical Bulletin Number 914-03.\n\nNote: Austrian Airworthiness Directive Number 88 refers.\n\nCompliance: No later than 30 November 2003.\n\nThis Airworthiness Directive becomes effective on 27 November 2003.\n\nBackground: This directive has been issued in response to advice from the engine manufacturer that applicable engines may have had the pressure control bore of the mixture enrichment jet incorrectly installed.\n\n![Signature of Jim Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 13 October 2003\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD remains tightly scoped to its original purpose: addressing a specific manufacturing defect in a narrow range of engine serial numbers. There is no evidence of scope creep — it does not expand to other engine models, introduce ongoing reporting requirements, or add unrelated maintenance obligations."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined structural sections (Applicability, Requirement, Compliance, Background)","Single, unambiguous action required (verify calibration per specified technical bulletin)","No nested conditions or exceptions","Limited cross-referencing (only one external document referenced: Bombardier Technical Bulletin 914-03, plus note to Austrian AD 88)","Clear, fixed compliance date with no alternative methods or conditional timelines"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specific Rotax 914 F-series engines (listed serial numbers) to verify the calibration of the mixture enrichment jet per Bombardier Technical Bulletin 914-03 by 30 November 2003. It’s mandatory for operators of affected light/recreational aircraft to prevent incorrect fuel mixture that can cause rough running or engine failure in flight."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD applies as issued to the listed engine serial numbers and requires verification per the referenced Bombardier technical bulletin. The background states it was issued because the manufacturer advised of a possible incorrect installation; no expansion or narrowing of scope beyond the issued applicability is indicated in the text."},"complexity_factors":["Narrow applicability to a limited set of Rotax 914 F serial numbers (Applicability)","Single, specific required action: verify calibration of the mixture enrichment jet per Bombardier Technical Bulletin 914‑03 (Requirement)","Compliance deadline and effective date create a fixed scheduling requirement (Compliance / Effective date)","Dependence on an external technical document for procedures may require specialist maintenance skills (Requirement references Bombardier TB)","Enforcement and legal effect flow from CASA delegate's issuance (Background / Signature)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specific Rotax 914 F engines (SNs 4.420.002–4.420.029 and 4.420.032–4.420.044) to verify the calibration of the mixture enrichment jet in accordance with Bombardier Technical Bulletin 914‑03 by 30 November 2003; it took effect 27 November 2003. CASA issued the AD after the manufacturer reported possible incorrect installation of the pressure‑control bore; owners/operators bear the compliance effort and must follow the technical bulletin under CASA oversight."},"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-13-mixture-enrichment-jet","history":"/api/acts/ad-rotax-13-mixture-enrichment-jet/history","analysis":"/api/acts/ad-rotax-13-mixture-enrichment-jet/analysis","conflicts":"/api/acts/ad-rotax-13-mixture-enrichment-jet/conflicts","importantCases":"/api/acts/ad-rotax-13-mixture-enrichment-jet/important-cases","documents":"/api/acts/ad-rotax-13-mixture-enrichment-jet/documents"}}