{"id":"F2006B08309","name":"AD/CESSNA 400/21 - Fuel Line Heatshield - Installation","slug":"ad-cessna-400-21-fuel-line-heatshield-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115711,"registerId":"commonwealth-F2006B08309-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/21 - Fuel Line Heatshield - Installation","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)  Cessna 400 Series Aeroplanes\n\n \n\nAD/CESSNA 400/21 Fuel Line Heatshield - Installation 3/71\n\nApplicability: All model 414 with S/Nos. 414-0001 to 414-0100 (except 414-0050). Document:  Cessna Multi-Engines SL ME70-44, Subject No. 1, only.\n\nCompliance: Within 100 hours time in service after 31 August 1971.\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\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1717},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive retains its original, highly specific scope targeting only early production Cessna 414 aircraft (serial numbers 0001-0100) for a single fire-safety modification. There is no indication of expansion to additional aircraft models, serial numbers, or systems beyond the original fuel line heatshield installation mandate."},"complexity_factors":["Single-page document with no sections or subsections","Only one operational requirement (install heatshield)","Narrow applicability limited to a specific serial number range (50 aircraft)","No defined terms, exceptions, or conditional logic","Single external reference to a manufacturer service letter"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority. Think of it as a recall notice for aircraft, legally requiring owners to fix a specific safety defect.\n\n**Who it affects:** Owners and operators of **Cessna 414 aircraft** with serial numbers **414-0001 through 414-0100** (but excluding serial number 414-0050).\n\n**What you must do:** Install **heatshields on the fuel lines**. This protects the fuel lines from excessive heat, reducing the risk of fire.\n\n**Deadline:** You must complete this work within **100 hours of flight time** after 31 August 1971.\n\n**Technical reference:** The installation must follow the instructions in **Cessna Service Letter ME70-44, Subject No. 1**."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation","history":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation/history","analysis":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation/analysis","conflicts":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation/conflicts","importantCases":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation/important-cases","documents":"/api/acts/ad-cessna-400-21-fuel-line-heatshield-installation/documents"}}