{"id":"F2006B04366","name":"AD/BELL 205/28 - Main Rotor Blade - Removal From Service","slug":"ad-bell-205-28-main-rotor-blade-removal-from-service","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44190,"registerId":"commonwealth-F2006B04366-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 205/28 - Main Rotor Blade - Removal From Service","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 205 Series Helicopters\n\n \n\nAD/BELL 205/28    Main Rotor Blade - Removal From Service    2/76\n\nApplicability:   All models 205A-1.\n\n \n\nRequirement:   Remove from service main rotor blades having the following Serial Nos:\n\n \n\nA2-03642, A2-03643, A2-03646, A2-27872, A2-27961, A2-27963, A2-27967 A2-27968, A2-27982, A2-28015, A2-28016, A2-28019, A2-28020, A2-28023 A2-28195, A2-28198, A2-28211, A2-29315, A2-29325, A2-29334, A2-29915 A2-29919 and A2-29920.\n\nCompliance:   Before further flight after 16 January 1976.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The document itself sets a single, explicit scope: it applies to all Bell 205A-1 helicopters and lists specific main rotor blade serial numbers to be removed, with a fixed compliance date (see \"Applicability\", \"Requirement\", \"Compliance\"). The text contains no language indicating an amendment, narrowing, or expansion relative to an earlier instrument; based solely on the supplied text, the stated scope stands as the directive's explicit scope and does not show a change."},"complexity_factors":["Narrow technical scope: applies only to Bell 205A-1 models and a finite list of blade serial numbers (see \"Applicability\" and \"Requirement\").","Clear, short compliance deadline: \"Before further flight after 16 January 1976\" is unambiguous but immediate (see \"Compliance\").","No procedural options or alternative compliance pathways provided in the text; action is mandatory (see \"Requirement\").","Operational burden lies outside the text: verifying serial numbers and obtaining replacements can be administratively and logistically non-trivial.","No explanatory or technical rationale included in the text, which limits interpretive questions about intent but increases operational uncertainty about replacement specifications.","Enforcement and record-keeping mechanisms are not detailed in the text, leaving practical implementation to operators and regulators."],"plain_english_summary":"This Airworthiness Directive from the Civil Aviation Safety Authority requires owners/operators of Bell 205A‑1 helicopters to inspect main rotor blades and remove from service any blade whose serial number appears on the AD’s list. Removal must be completed before the next flight after 16 January 1976. It immediately burdens affected operators with inspection, replacement and downtime costs and short‑notice grounding until airworthiness is restored."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1976. It has not evolved beyond its original purpose of removing specific defective rotor blades from service. The scope remains exactly as intended: a targeted equipment recall for identified serial numbers."},"complexity_factors":["Single, unambiguous requirement with no conditional logic","No defined terms requiring interpretation","No cross-references to other legislation or regulations","Simple list of 23 serial numbers — no ranges or complex identification criteria","Clear, absolute compliance deadline with no exceptions or alternative methods of compliance","Total length is approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt orders the immediate removal from service of specific main rotor blades on Bell 205A-1 helicopters. These blades, identified by their serial numbers, must be taken off the aircraft and cannot be used.\n\n**Who it affects:**\nOwners and operators of Bell 205A-1 helicopters that have main rotor blades with any of the 23 listed serial numbers (ranging from A2-03642 to A2-29920).\n\n**Why it matters:**\nMain rotor blades are critical components — if they fail, the helicopter crashes. This directive was issued because those specific blades were found to be unsafe, likely due to a manufacturing defect, fatigue, or damage discovered after they entered service. The \"before further flight\" compliance deadline means this is urgent: no more flying until the blades are removed.\n\n**Key details:**\n- **Compliance deadline:** Before any further flight after 16 January 1976\n- **Action required:** Physical removal of the affected blades\n- **Consequence of ignoring:** Operating the aircraft would violate civil aviation regulations and put lives at risk"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service","history":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service/history","analysis":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service/analysis","conflicts":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service/conflicts","importantCases":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service/important-cases","documents":"/api/acts/ad-bell-205-28-main-rotor-blade-removal-from-service/documents"}}