{"id":"F2006B02249","name":"AD/AL 250/32 - Engine Fuel and Control, Electrical Harness - Replacement","slug":"ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41479,"registerId":"commonwealth-F2006B02249-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 250/32 - Engine Fuel and Control, Electrical Harness - Replacement","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Allison Turbine Engines - 250 Series\n\n \n\nAD/AL 250/32  Engine Fuel and Control, Electrical Harness - Replacement\n\nApplicability: All 250-C28B engines prior to S/N CAE 860053. Document:  Allison 250-C28B CEB 73-2003.\n\nCompliance: Before further flight after 8 January 1979.\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\n2/79\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1979. It has not expanded beyond its original narrow purpose of addressing a specific electrical harness defect in a specific engine series."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — all language is plain technical aviation terminology","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Single, unambiguous compliance action with a hard deadline","No conditional logic, exceptions, or alternative compliance methods","Simple applicability test based solely on engine model and serial number range"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:**\nOrders the **replacement of electrical harnesses** in the engine fuel and control systems of specific Allison 250-C28B turbine engines.\n\n**Who it affects:**\nOwners and operators of **Allison 250-C28B engines with serial numbers before CAE 860053**. These are typically used in helicopters and light aircraft.\n\n**Why it matters:**\nElectrical harnesses (wiring bundles) in fuel and engine control systems can degrade or fail, potentially causing **engine failure or loss of control**. This AD mandates a fix before a specific deadline to prevent accidents.\n\n**Key requirement:**\nThe replacement must be completed **before any further flight after 8 January 1979** — meaning once that date passes, the aircraft cannot legally fly until the work is done.\n\n**Source document:**\nThe technical instructions come from Allison's own service bulletin (CEB 73-2003), which manufacturers issue when they discover safety issues."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text supplied does not indicate any change of scope from an earlier instrument. It specifies applicability (Allison 250-C28B engines prior to S/N CAE 860053), cites the manufacturer document for the replacement procedure, and sets the compliance deadline; there is no reference in the source to a prior or amended scope."},"complexity_factors":["Single, specific mandatory action (replacement of electrical harness) rather than a multi-step regulatory regime.","Narrow applicability defined by engine model and serial-number cutoff (Allison 250-C28B engines prior to S/N CAE 860053). (Applicability).","Clear compliance deadline: before further flight after 8 January 1979, creating binary compliance outcome (grounded until done). (Compliance).","Reference to an external manufacturer document (Allison 250-C28B CEB 73-2003) for technical implementation increases operational detail but not legal complexity. (Document).","No stated alternatives, exemptions or phased compliance options in the text, which simplifies legal interpretation but concentrates operational burden on owners/operators. (Compliance)."],"plain_english_summary":"This AD mandates replacement of the engine fuel-and-control electrical harness on Allison 250‑C28B turboshaft engines with serial numbers earlier than CAE 860053, to be done before the engine’s next flight per Allison 250‑C28B CEB 73‑2003. \n\nIt affects owners/operators and maintenance organisations, is enforced by the Civil Aviation Safety Authority under Part 39, and creates an immediate, one‑off maintenance cost and downtime to restore legal airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement","history":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement/history","analysis":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement/analysis","conflicts":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement/conflicts","importantCases":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement/important-cases","documents":"/api/acts/ad-al-250-32-engine-fuel-and-control-electrical-harness-replacement/documents"}}