{"id":"F2006B04570","name":"AD/BELL 212/39 - Engine Fuel Switch","slug":"ad-bell-212-39-engine-fuel-switch","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114300,"registerId":"commonwealth-F2006B04570-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 212/39 - Engine Fuel Switch","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)  Bell Helicopter Textron 212 Series Helicopters\n\n \n\nAD/BELL 212/39 Engine Fuel Switch 11/88\n\nApplicability: Model 212 S/N 30680 through 31206, 32109 through 32142 and 32201 through\n\n32262.\n\n \n\nRequirement: Action in accordance with Bell ASB 212-88-52. Compliance: Prior to 1 January 1989.\n\nBackground: Reports received from the field reveal failure of the leaf spring within the engine fuel switch. A leaf spring failure has resulted in the engine fuel valve motoring to the closed position with associated engine flame out. The leaf spring failure was a result of a manufacturing operation during switch assembly on items with a date code 78XX or earlier.\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":1557},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains focused on its original purpose: addressing the specific manufacturing defect in the leaf spring of engine fuel switches installed in affected Bell 212 helicopters. No evidence of scope creep or expansion beyond this specific safety issue."},"complexity_factors":["References external technical document (Bell ASB 212-88-52) without reproducing its contents","Requires cross-referencing aircraft serial numbers against three specific ranges","Requires identification of date codes on components (78XX or earlier)","Urgent compliance timeframe creates operational pressure"],"plain_english_summary":"This AD requires mandatory inspection and repair of a defective engine fuel switch on certain Bell 212 helicopters to prevent in‑flight engine flameout from a broken leaf spring. Affected aircraft have older fuel switches (date codes 78XX or earlier); operators must follow Bell Alert Service Bulletin 212-88-52 and comply before 1 January 1989.\n\nAircraft may not legally fly until the repair is completed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-39-engine-fuel-switch","history":"/api/acts/ad-bell-212-39-engine-fuel-switch/history","analysis":"/api/acts/ad-bell-212-39-engine-fuel-switch/analysis","conflicts":"/api/acts/ad-bell-212-39-engine-fuel-switch/conflicts","importantCases":"/api/acts/ad-bell-212-39-engine-fuel-switch/important-cases","documents":"/api/acts/ad-bell-212-39-engine-fuel-switch/documents"}}