{"id":"F2006B04536","name":"AD/BELL 206/86 - Pylon Support Installation Retaining Bolts - Inspection","slug":"ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114253,"registerId":"commonwealth-F2006B04536-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/86 - Pylon Support Installation Retaining Bolts - Inspection","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\nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/86 Pylon Support Installation Retaining\n\nBolts - Inspection\n\n\n11/80\n\n \n\nApplicability: All models 206L and 206L-1 with serial numbers referenced in Bell Technical Bulletin No. 206L-80-52.\n\n \n\nDocument: Bell Technical Bulletin No. 206L-80-52.\n\n \n\nCompliance: Within 100 hours time in service after 30 November 1980.\n\n \n\nBackground: The manufacturer advises that some pylon support retaining bolts may have been incorrectly installed at manufacture.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1459},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly focused on its original purpose: addressing a specific manufacturing defect in retaining bolts for a limited range of helicopter serial numbers. It requires only a one-time inspection without expanding to ongoing monitoring or additional aircraft components."},"complexity_factors":["Extremely short document (approximately 80 words)","No defined terms or interpretation section","Single external reference to manufacturer technical bulletin","Binary applicability test (specific model + serial number list)","Simple compliance requirement with single deadline and no exceptions"],"plain_english_summary":"**What this does:** Requires owners of specific Bell helicopters to check certain bolts that hold the tail section to the aircraft body.\n\n**Who it affects:** Owners and operators of Bell 206L and 206L-1 helicopters with serial numbers listed in Bell Technical Bulletin No. 206L-80-52.\n\n**What you must do:** Inspect the **pylon support retaining bolts** (the large bolts that secure the tail boom structure to the helicopter body) within 100 hours of flying time after 30 November 1980.\n\n**Why this matters:** The manufacturer discovered some helicopters were built with these bolts installed incorrectly. If these bolts fail during flight, the tail could separate from the aircraft, causing a crash."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection","history":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection/history","analysis":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection/analysis","conflicts":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection/important-cases","documents":"/api/acts/ad-bell-206-86-pylon-support-installation-retaining-bolts-inspection/documents"}}