{"id":"F2006B04431","name":"AD/BELL 206/117 Amdt 1 - Bogus Main Rotor Blades","slug":"ad-bell-206-117-amdt-1-bogus-main-rotor-blades","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44256,"registerId":"commonwealth-F2006B04431-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/117 Amdt 1 - Bogus Main Rotor Blades","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAD/BELL 206/117\n\nAmdt 1\n\n  \n\nBogus Main Rotor Blades 2/90 TX\n\nApplicability: Models 206A, 206B, 206L, 206L-1 and 206L-3.\n\nRequirement: Visually inspect main rotor blades P/N 206-015-001-001, 206-015-001-103, 206-015- 001-105 and 206-010-200-033 and remove from service the blades with the S/Nos listed below.\n\nModels 206A and 206B:\n\nBlade S/Nos: TAC-0089, TAC0542, TAC-0607, TAC-0614, TAC-0624, TAC-1643, TAC-1749, TAC-1776, TAC-1831, TAC-1911, TAC-1922,\n\nTAC-2399, TAC-2768, TAC5742, TKK-9794, TKK-9883 and TKK-9933.\n\nModels 206L, 206L-1 and 206L-3:\n\nBlade S/Nos: T-92, T-245, T-417, TLY-0075, TLY-0095, TLY-0764, TLY-0770, TLY-0973, TLY-1438, TLY-1619, TLY-1653, TLY-1697, TLY-1766, TLY-1801, TLY-1858, TLY-1953, TLY-1984, TLY-2031, TLY-2039, TLY-2064, TLY-2081, TLY-2148, TLY-2335, TLY-2337, TLY-2549, TLY-2603, TLY-2604, TLY-2625, TLY-2633, TLY-2648, TLY-2745, TLY-2786, TLY-2951 and TLY-2954.\n\nNote: FAA AD 89-22-01 R1 refers.\n\nCompliance: Prior to further flight after 11 December 1989.\n\nBackground: The listed main rotor blades have reached their fatigue life limit. These were subsequently resold with falsified component history cards. Amendment 1 extends the serial number coverage.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the set of serial numbers covered by the original AD, thereby broadening the population of blades (and so aircraft) subject to mandatory inspection and removal (Background). Compliance timing requirement remains prior to further flight after 11 December 1989 (Compliance)."},"complexity_factors":["Narrow technical scope: specific models and listed blade part numbers (Applicability; Requirement).","Immediate compliance deadline creates operational disruption risk for affected aircraft (Compliance).","Long explicit serial-number lists increase administrative checking and record-review workload (Requirement).","Presence of falsified component history cards implies need for provenance verification and possible follow-up investigations (Background).","Cross-reference to FAA AD 89-22-01 R1 requires alignment with external regulatory material (Note)."],"plain_english_summary":"This directive requires operators of Bell 206A/B/L series helicopters to visually inspect specified main rotor blade part and serial numbers and to remove from service any matching blades before further flight after 11 December 1989. It affects aircraft operators and maintenance organisations, who must bear inspection and replacement costs; the Civil Aviation Safety Authority enforces compliance (Requirement, Applicability, Compliance). Amendment 1 enlarges the list of affected serial numbers (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment performs exactly the function amendments to Airworthiness Directives typically perform: it expands the list of affected serial numbers to capture additional counterfeit parts discovered since the original issue. The scope remains tightly focused on the specific safety hazard (bogus fatigue-life-expired rotor blades) and does not extend to unrelated maintenance requirements or aircraft systems."},"complexity_factors":["Single, unambiguous requirement with no conditional logic or exceptions","Only 4 part numbers and 51 specific serial numbers to check — essentially a lookup table","No defined terms requiring interpretation","No cross-references to other legislation (only a note referencing the equivalent FAA directive for context)","Clear, fixed compliance deadline with no alternative methods of compliance"],"plain_english_summary":"Operators of Bell 206 series helicopters must immediately ground and remove from service specific main rotor blades identified by serial number because they are counterfeit or have falsified history cards. These blades have exceeded their fatigue life, posing a catastrophic failure risk.\n\nThis mandatory CASA amendment expands the serial-number list; before any further flight after 11 December 1989, inspect blades and remove any that match the listed serial numbers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades","history":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades/history","analysis":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades/analysis","conflicts":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades/conflicts","importantCases":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades/important-cases","documents":"/api/acts/ad-bell-206-117-amdt-1-bogus-main-rotor-blades/documents"}}