{"id":"F2005L03433","name":"AD/BELL 47/101 - Scissors Assembly and Weld Assembly Scissors Bracket","slug":"ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":38789,"registerId":"commonwealth-F2005L03433-current","compilationNumber":null,"startDate":"2026-04-01","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 47/101 | Scissors Assembly and WeldAssembly Scissors Bracket | 13/2005 DM |\n| -------------- | --------------------------------------------------- | ---------- |\n\n| Applicability: | Bell Model 47D1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, and 47G-5A helicopters; and, Coastal Helicopters Inc. OH-13H (Tomcat Mark 5A, 6B, or 6C) helicopters:Equipped with scissors assembly part numbers 74-150-949-9, or 74-150-949-5, 74-150-249-5M; or,Equipped with weld assembly scissors bracket part number 74-150-117-13M.All Model 47 series helicopters not listed above that are equipped with the affected parts that were produced under PMA No. PQ808SW or installed under STC No. SH2772SW;                                                                                                                                     |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Determine and record on the service record or equivalent record, the total hours time in service of each affected part.If the hours time in service cannot be determined, or if the total hours time in service is 5,000 or more hours, before further flight, replace the affected part with a new part or a serviceable part with known hours time in service.Note 1: This Directive establishes a life limit of 5,000 hours time in service for each affected PMA-produced scissors assembly and each affected PMA-produced weld assembly scissors bracket.Note 2: Texas Helicopter Co., Inc. Service Bulletin No. SB 003 dated 1 December 2002, refers.Note 3: FAA AD 2005-21-04 Amdt 39-14342 refers. |\n| Compliance:    | Within 60 days after 21 November 2005.Thereafter, replace each affected part before it accumulates 5,000 hours time in service.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 9 November 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n\n| Background: | The FAA has determined the need to establish a life limit on scissors assemblies and weld assembly scissors brackets produced under PMA No. PQ808SW or installed under Supplemental Type Certificate No. SH2772SW. The actions specified by this Directive are intended to establish a life limit to prevent using a scissors assembly or weld assembly scissors bracket past it’s life limit, which could result in failure of the part and subsequent loss of control of the helicopter. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n3 November 2005","sortOrder":0},{"sectionNumber":"AD/BELL 47/101","sectionType":"part","heading":"AD/BELL 47/101","content":"## AD/BELL 47/101","sortOrder":1},{"sectionNumber":"Scissors Assembly and WeldAssembly Sciss","sectionType":"part","heading":"Scissors Assembly and WeldAssembly Scissors Bracket","content":"## Scissors Assembly and Weld  \nAssembly Scissors Bracket","sortOrder":2},{"sectionNumber":"13/2005 DM","sectionType":"part","heading":"13/2005 DM","content":"## 13/2005 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 implements the FAA’s identified remedial measure by formally establishing a 5,000‑hour life limit and requiring recordkeeping and replacement for the specified PMA/STC parts. It does not broaden the class of affected parts beyond those produced under PMA PQ808SW or installed under STC SH2772SW; it codifies the life limit and compliance timetable set out in the Background and Requirement sections."},"complexity_factors":["Multiple affected airframes and specific part numbers to identify (Applicability).","Applicability tied to parts produced under PMA No. PQ808SW or installed under STC No. SH2772SW, adding a production/installation provenance check (Applicability).","Mandatory record‑keeping: determine and record total hours time‑in‑service for each affected part (Requirement).","Clear numeric life limit and replacement trigger (>= 5,000 hours or unknown) which creates a predictable compliance action (Requirement; Note 1).","Fixed compliance window (within 60 days after 21 Nov 2005) and ongoing replacement before the life limit, imposing scheduling and parts‑inventory costs on operators (Compliance).","References to external documents (Texas Helicopter Service Bulletin and FAA AD) require cross‑checking other sources for implementation details (Notes 2–3).","Low regulatory discretion: prescriptive, mechanically enforceable actions reduce interpretive complexity but increase operational burden on owners/operators (Requirement; Compliance)."],"plain_english_summary":"This Directive requires owners/operators of specified Bell 47-series (and certain Coastal/OH‑13H) helicopters fitted with listed scissors assemblies or weld‑assembly scissors brackets produced under PMA No. PQ808SW or installed under STC No. SH2772SW to determine and record each affected part’s total hours time‑in‑service. If hours are unknown or the part has 5,000 hours or more, it must be replaced before further flight. It establishes a 5,000‑hour life limit with initial compliance within 60 days and ongoing replacement before 5,000 hours (Requirement; Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: establishing a life limit on specific PMA-produced parts for Bell 47 helicopters. The document reflects its intended purpose as a targeted safety directive responding to FAA findings about part fatigue. No scope creep is evident."},"complexity_factors":["Single, clearly defined requirement with straightforward conditional logic (if hours ≥ 5,000 or unknown, then replace)","Limited applicability scope: specific helicopter models and specific part numbers explicitly listed","No nested exceptions or complex cross-referencing to other legislation","Only 3 short notes referencing related technical documents (Service Bulletin and FAA AD)","Clear compliance timeline (60 days) and ongoing maintenance trigger (5,000 hour life limit)","Minimal defined terms — only standard aviation terminology (PMA, STC, time in service) without extensive interpretation sections"],"plain_english_summary":"This mandatory CASA Airworthiness Directive targets specific Bell 47 helicopters and certain modified OH-13H/parts-installed variants. It imposes a 5,000‑hour life limit on the scissors assembly and weld assembly scissors bracket, requires operators to check flight records, and mandates replacement if records are missing or show 5,000+ hours before further flight.\n\nThe measure prevents metal‑fatigue failure of rotor components that could lead to in‑flight loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket","history":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket/history","analysis":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket/analysis","conflicts":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket/conflicts","importantCases":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket/important-cases","documents":"/api/acts/ad-bell-47-101-scissors-assembly-and-weld-assembly-scissors-bracket/documents"}}