{"id":"F2009L02584","name":"AD/BELL 47/103 - Main Rotor Blades Box Beam Clips - 2","slug":"ad-bell-47-103-main-rotor-blades-box-beam-clips-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79551,"registerId":"commonwealth-F2009L02584-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 47 (All Variants","sectionType":"division","heading":"Bell Helicopter Textron 47 (All Variants) Series Helicopters","content":"### Bell Helicopter Textron 47 (All Variants) Series Helicopters\n\n| AD/BELL 47/103 | Main Rotor Blades Box Beam Clips - 2 | 9/2009 DM |\n| -------------- | ------------------------------------ | --------- |\n\n| Applicability: | Kawasaki-Bell Model 47G-2A and 47G3B-KH4 helicopters equipped with main rotor blade part number 47-110-250-21 (047-110-250-021), with serial number A-303,A-304, A-312 or A-316.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Perform a visual inspection of each main rotor blade for correct installation of box beam clips in accordance with PART II of the Accomplishment Instructions of Kawasaki-Bell Service Bulletin No. KSB-BELL-370 original issue, or later JCAB approved revision.2. For main rotor blades held as spares, perform a visual inspection of each main rotor blade for correct installation of box beam clips in accordance with PART I of the Accomplishment Instructions of Kawasaki-Bell Service Bulletin No. KSB-BELL-370 original issue, or later JCAB approved revision.If a main rotor blade is found with an incorrectly installed clip, before further flight, replace that unserviceable main rotor blade with a serviceable main rotor blade that has a clip that is installed correctly.Special flight permits may be issued to operate the helicopter to a location where the requirements of this Directive can be accomplished, provided the one-time ferry flight does not exceed 5 hours time in service.Note: JCAB AD TCD-7309-2009 refers. |\n| Compliance:    | 1. Before further flight after 29 June 2009, unless already accomplished.2. Before installation on a helicopter.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 29 June 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n\n| Background: | A report was received of a main rotor blade with an incorrectly installed clip. The actions required by this Directive are intended to prevent a main rotor blade spar crack as a result of an incorrectly installed clip, loss of a main rotor blade, and subsequent loss of control of the helicopter. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 June 2009","sortOrder":0},{"sectionNumber":"AD/BELL 47/103","sectionType":"part","heading":"AD/BELL 47/103","content":"## AD/BELL 47/103","sortOrder":1},{"sectionNumber":"Main Rotor Blades Box Beam Clips - 2","sectionType":"part","heading":"Main Rotor Blades Box Beam Clips - 2","content":"## Main Rotor Blades Box Beam Clips - 2","sortOrder":2},{"sectionNumber":"9/2009 DM","sectionType":"part","heading":"9/2009 DM","content":"## 9/2009 DM","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive's scope aligns with the stated safety aim in the Background: inspect specified blades for clip installation and replace defective blades. It applies only to the listed models, part number and serials and does not expand beyond those items; it does require inspection of spares and references the Kawasaki‑Bell Service Bulletin for procedural detail (Applicability; Requirement; Background)."},"complexity_factors":["Narrow, specific applicability by model, part number and serial numbers reduces scope (Applicability).","Action is a simple visual inspection plus replacement before further flight — low technical complexity (Requirement).","References Kawasaki‑Bell Service Bulletin KSB‑BELL‑370 and JCAB approved revisions—requires access to and compliance with an external document (Requirement).","Compliance timing is immediate (before further flight after 29 June 2009) — tight scheduling and potential operational disruption (Compliance).","Allowance for a limited ferry flight (up to 5 hours) to reach a repair location adds procedural discretion (Requirement).","Includes spares inspection before installation, creating additional parts‑management and recordkeeping burden (Requirement)."],"plain_english_summary":"This Directive requires owners/operators of Kawasaki‑Bell Model 47G‑2A and 47G3B‑KH4 helicopters fitted with main rotor blade part 47‑110‑250‑21 (serials A‑303, A‑304, A‑312, A‑316) to visually inspect blades for correct box‑beam clip installation and to replace any blade with an incorrectly installed clip before further flight (Requirement; Compliance).\n\nOwners/operators and maintenance providers pay for inspections, parts and labour; a one‑time ferry permit up to five hours may be issued to reach a repair location (Requirement; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing/assembly defect in specific helicopter models. The scope remains precisely limited to the reported safety issue and affected aircraft serial numbers, with no evidence of scope creep beyond the original safety purpose."},"complexity_factors":["Single, specific mechanical issue addressed (box beam clip installation)","Only 4 specific serial numbers affected","Clear, sequential compliance requirements (visual inspection → replacement if faulty)","Single cross-reference to external technical document (Kawasaki-Bell Service Bulletin)","One straightforward exception (5-hour ferry flight permit)","No nested definitions or conditional logic chains","Background explanation provided in plain language"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Kawasaki‑Bell Model 47G‑2A and 47G3B‑KH4 helicopters with specified main rotor blades (part 47‑110‑250‑21, listed serial numbers) to visually inspect blades for correct installation of box beam clips per Bell service bulletin KSB‑BELL‑370. Faulty blades must be replaced before flight; spare blades must be inspected before installation; one ferry flight (up to 5 hours) is allowed to reach repair. Incorrect clips can crack the blade spar and cause in‑flight loss of control. Effective 29 June 2009."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2","history":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2/history","analysis":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2/analysis","conflicts":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2/conflicts","importantCases":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2/important-cases","documents":"/api/acts/ad-bell-47-103-main-rotor-blades-box-beam-clips-2/documents"}}