{"id":"F2008L02971","name":"AD/OH-58/7 - Swashplate Support Assembly","slug":"ad-oh-58-7-swashplate-support-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74944,"registerId":"commonwealth-F2008L02971-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell OH-58A (206A-1) Series Helicopters","sectionType":"division","heading":"Bell OH-58A (206A-1) Series Helicopters","content":"### Bell OH-58A (206A-1) Series Helicopters\n\n| AD/OH-58/7 | Swashplate Support Assembly | 9/2008 |\n| ---------- | --------------------------- | ------ |\n\n| Applicability: | Model OH-58A (Bell 206A-1) series helicopters, including all certificated versions; equipped with swashplate support assembly, part number 206-010-452-001, -005, or-109.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For swashplate support assemblies with 1,500 hours or more total time in service, visually inspect the swashplate support assembly in the fillet radius area for cracks using 10x magnification or more, in accordance with the Accomplishment Instructions of BHTI Alert Service Bulletin No. 206-93-74 Revision B, or later FAA approved revision.2. For swashplate support assemblies with less than 1,500 hours time in service, visually inspect the swashplate support assembly in the fillet radius area for cracks using 10x magnification or more, in accordance with the Accomplishment Instructions of BHTI Alert Service Bulletin No. 206-93-74 Revision B, or later FAA approved revision.If a crack is suspected, before further flight, perform a dye penetrant inspection in accordance with Requirement document.Replace any cracked swashplate support assembly with a serviceable assembly before further flight.Installation of a swashplate support assembly part number 206-010-452-113, constitutes terminating action to the requirements of this Directive.Note: FAA AD 94-19-02 Amendment 39-9023 refers. |\n| Compliance:    | 1. Unless the initial inspection is already accomplished, within 25 hours time in service after the effective date of this Directive, and thereafter at intervals not to exceed 50 hours time in service; until a swashplate support assembly part number 206-010-452-113 is installed.2. Before accumulating 1,525 hours time in service, and thereafter at intervals not to exceed 50 hours time in service, until a swashplate support assembly part number 206-010-452-113 is installed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 28 August 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n\n| Background: | The FAA received reports of cracks in the swashplate support assembly fillet radius area near the base. The actions specified in this Directive are intended to prevent failure of the swashplate support assembly, loss of control of the main rotor system, and subsequent loss of control of the helicopter. |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n14 July 2008","sortOrder":0},{"sectionNumber":"AD/OH-58/7","sectionType":"part","heading":"AD/OH-58/7","content":"## AD/OH-58/7","sortOrder":1},{"sectionNumber":"Swashplate Support Assembly","sectionType":"part","heading":"Swashplate Support Assembly","content":"## Swashplate Support Assembly","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope aligns with the stated safety objective in the Background: detect and remove cracked swashplate support assemblies to prevent failure and loss of control. The directive confines action to inspection, dye-penetrant confirmation, and replacement or installation of a specified terminating part, without expanding obligations beyond those remedial maintenance measures (Background; Requirement; Compliance)."},"complexity_factors":["Narrow technical focus on a single component and explicit part numbers (Applicability).","Two-tier inspection trigger depending on total time-in-service (>=1,500 hours vs <1,500 hours) (Requirement; Compliance).","Specified inspection technique and tools: 10× magnification for visual inspections and dye-penetrant for suspected cracks (Requirement).","Multiple short compliance intervals and an initial short-term inspection window (initial within 25 hours, then 50-hour intervals; alternate timeline before 1,525 hours) (Compliance).","Clear terminating action if a specified replacement part (206-010-452-113) is installed (Requirement).","Procedural reliance on an external manufacturer Alert Service Bulletin and cross-reference to an FAA AD for implementation details (Requirement; Note)."],"plain_english_summary":"Mechanically, this directive requires recurring visual inspections (10× magnification) of the swashplate support assembly fillet radius on certain Bell OH‑58A helicopters, dye‑penetrant checks if a crack is suspected, replacement of any cracked assembly before further flight, and allows fitting part 206‑010‑452‑113 as a terminating action. (Requirement; Compliance)\n\nIt applies to owners/operators of OH‑58A helicopters with the listed support assembly part numbers and imposes time‑based maintenance and replacement costs to reduce the risk of swashplate failure and loss of main‑rotor control. (Applicability; Background)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific mechanical defect in a specific aircraft model. The scope remains tightly focused on the swashplate support assembly safety issue as originally identified. No scope creep is evident."},"complexity_factors":["Multiple conditional inspection schedules based on flight hours (two different compliance paths)","Cross-reference to external technical document (BHTI Alert Service Bulletin No. 206-93-74 Revision B)","Reference to FAA AD 94-19-02 Amendment 39-9023 for additional context","Specific part number tracking required (-001, -005, -109 vs -113 terminating part)","Nested conditional logic: suspected crack triggers dye penetrant inspection, confirmed crack triggers replacement","Terminating action clause (installation of -113 part ends recurring obligations)"],"plain_english_summary":"This CASA Airworthiness Directive mandates repetitive inspections of the swashplate support assembly on Bell OH-58A (Bell 206A-1 series) helicopters for cracks near the base of certain part numbers (…-001, …-005, …-109). Inspections start based on hours-in-service, require dye-penetrant follow-up for suspected cracks, and demand part replacement if cracked. Installing the improved …-113 part number is a terminating action. This prevents main-rotor loss of control and potential crashes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-oh-58-7-swashplate-support-assembly","history":"/api/acts/ad-oh-58-7-swashplate-support-assembly/history","analysis":"/api/acts/ad-oh-58-7-swashplate-support-assembly/analysis","conflicts":"/api/acts/ad-oh-58-7-swashplate-support-assembly/conflicts","importantCases":"/api/acts/ad-oh-58-7-swashplate-support-assembly/important-cases","documents":"/api/acts/ad-oh-58-7-swashplate-support-assembly/documents"}}