{"id":"F2006B04486","name":"AD/BELL 206/3 - Forward Engine Mount Attachment - Inspection and Modification","slug":"ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44323,"registerId":"commonwealth-F2006B04486-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/3 - Forward Engine Mount Attachment - Inspection and Modification","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 Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/3 Forward Engine Mount Attachment - Inspection\n\nand Modification\n\n\n6/68\n\n \n\nApplicability: All model 206A with S/Nos. 4, 6 to 10, 12 to 26, 28 to 59, 61 to 79, 81 to 83, 86 to\n\n91, 93 to 97 and 99 to 103.\n\n \n\nDocument: Bell SB No. 206A-4A.\n\n \n\nCompliance: Inspection at intervals not exceeding 25 hours time in service. Modification by 1 August 1968.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1493},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope addressing a specific mechanical defect in the forward engine mount attachment of identified helicopter models. No expansion beyond the original safety-critical hardware issue."},"complexity_factors":["Specific but disjointed serial number list requires careful aircraft identification","Simple dual compliance structure: recurring inspection plus one-time modification","No conditional exceptions or nested legal tests","Single technical reference document (Bell SB 206A-4A)"],"plain_english_summary":"This directive mandates safety actions for specific Bell 206A helicopters to prevent engine mount failure. **Who it affects:** Owners and operators of Bell 206A helicopters with serial numbers 4, 6–10, 12–26, 28–59, 61–79, 81–83, 86–91, 93–97, and 99–103. **What you must do:**\n\n1. **Inspect** the forward engine mount attachment at least every 25 hours of flight time (time in service)\n2. **Modify** the engine mount attachment by the specified deadline (1 August 1968), following the technical instructions in Bell Service Bulletin 206A-4A\n\n**Why it matters:** The forward engine mount attachment can develop defects that could lead to catastrophic failure, potentially causing the engine to separate from the aircraft. This directive ensures critical safety checks and permanent corrective action are taken."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification","history":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification/history","analysis":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification/analysis","conflicts":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification/important-cases","documents":"/api/acts/ad-bell-206-3-forward-engine-mount-attachment-inspection-and-modification/documents"}}