{"id":"F2006B02238","name":"AD/AL 250/16 - Ceco Fuel Control and Governor External Plug and Lever - Replacement","slug":"ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41468,"registerId":"commonwealth-F2006B02238-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 250/16 - Ceco Fuel Control and Governor External Plug and Lever - 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 250/16 Ceco Fuel Control and Governor External\n\nPlug and Lever - Replacement\n\n\n10/71\n\n \n\nApplicability:  All 250-C20 series fitted with the following accessories: Fuel Control: P/N 6875653 (Ceco 104000A1):- S/N OAACO1 OAACO4 to OAACO9, IAAC11 to IAAC15,\n\nIAAC17 and IAAC18, IAAC21, IAAC40. Power Turbine Governor: P/N 6875654 (Ceco 104100A1):- S/N OAAD01 and OAAD02, OAAD04 to OAAD06, OAAD08 to OAAD12, IAAD15 to IAAD18, IAAD20 to IAAD22.\n\n \n\nDocument: Allison CEB No. 250 CEB-1002. Effective:  29 October 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2441},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope targeting only the specific defective Ceco components (P/N 6875653 and 6875654) identified in the original safety assessment. There is no indication of scope expansion beyond the initial safety-critical replacement requirement."},"complexity_factors":["19 discrete serial number ranges across two accessory types requiring precise cross-referencing","Compliance dependent on external technical bulletin (Allison CEB-1002) not reproduced within the directive","Dense aviation nomenclature (part numbers, power turbine governors, fuel control P/Ns)","Narrow applicability limited to specific manufacturing batches"],"plain_english_summary":"**What it does**\n\nThis safety directive requires aircraft operators to replace faulty external plugs and levers on specific fuel controls and turbine governors fitted to Allison 250-C20 series engines.\n\n**Who must comply**\n\nThis applies only to operators whose aircraft have engines with **very specific part and serial numbers**:\n\n- **Fuel Controls (Part No. 6875653)**: Serial numbers OAACO1, OAACO4 through OAACO9, IAAC11 through IAAC15, IAAC17, IAAC18, IAAC21, and IAAC40\n- **Power Turbine Governors (Part No. 6875654)**: Serial numbers OAAD01, OAAD02, OAAD04 through OAAD06, OAAD08 through OAAD12, IAAD15 through IAAD18, and IAAD20 through IAAD22\n\n**What you need to do**\n\nReplace the affected external plugs and levers following the technical instructions in **Allison CEB No. 250 CEB-1002** (an external manufacturer bulletin).\n\n**Why this matters**\n\nThese specific Ceco-made components were found to be defective and could cause fuel control or governor failures, potentially leading to sudden loss of engine power in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement","history":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement/history","analysis":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement/analysis","conflicts":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement/conflicts","importantCases":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement/important-cases","documents":"/api/acts/ad-al-250-16-ceco-fuel-control-and-governor-external-plug-and-lever-replacement/documents"}}