{"id":"F2005L02804","name":"AD/BELL 430/4 - Servo Actuator Bolts","slug":"ad-bell-430-4-servo-actuator-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":37721,"registerId":"commonwealth-F2005L02804-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 43","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters\n\n| AD/BELL 430/4 | Servo Actuator Bolts | 11/2005 |\n| ------------- | -------------------- | ------- |\n\n| Applicability: | Model 430 helicopters, serial numbers 49001 through 49106.                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Replace three servo actuator to actuator support attachment bolts, in accordance with the Accomplishment instructions provided in BHTC Alert Service Bulletin (ASB) 430-05-33, dated 16 February 2005, or later Transport Canada approved revision.Insert revised Chapter 4 and 5 (supplied as attachment to ASB 430-05-33) into Maintenance Manual BHT-430-MM-2.Note: Transport Canada AD CF-2005-09 refers. |\n| Compliance:    | Within 150 flight hours after 27 October 2005, but no later than 31 December 2005; unless already accomplished.                                                                                                                                                                                                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 27 October 2005.                                                                                                                                                                                                                                                                                                                                            |\n| Background:    | The manufacturer has determined that a new airworthiness limitation life of 5,000 hours is required on the servo actuator support attachment bolts.                                                                                                                                                                                                                                                           |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 September 2005","sortOrder":0},{"sectionNumber":"AD/BELL 430/4","sectionType":"part","heading":"AD/BELL 430/4","content":"## AD/BELL 430/4","sortOrder":1},{"sectionNumber":"Servo Actuator Bolts","sectionType":"part","heading":"Servo Actuator Bolts","content":"## Servo Actuator Bolts","sortOrder":2},{"sectionNumber":"11/2005","sectionType":"part","heading":"11/2005","content":"## 11/2005","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":2,"scope_assessment":{"changed":false,"description":"The directive implements the manufacturer's determination of a new 5,000-hour life limit for the servo actuator support attachment bolts by mandating bolt replacement and a maintenance-manual amendment. It does not expand applicability beyond the specified serial-number range or add requirements unrelated to that life-limit change; it also references the corresponding Transport Canada AD."},"complexity_factors":["Narrow applicability: applies only to Model 430, serial numbers 49001–49106","Single technical action required: replace three specific attachment bolts","Maintenance-document update required: insert revised Chapters 4 and 5 into manual","Reference to external documents: relies on BHTC ASB 430-05-33 (or later TC-approved revision)","Time-limited compliance window (150 flight hours or by 31 Dec 2005)","Cross-jurisdictional reference: cites Transport Canada AD CF-2005-09"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Bell 430 helicopters (serials 49001–49106) to replace three servo-actuator-to-support attachment bolts and to insert revised Chapters 4 and 5 into the maintenance manual, following BHTC Alert Service Bulletin 430-05-33 (or a later Transport Canada–approved revision).\n\nCompliance is within 150 flight hours after 27 October 2005 or by 31 December 2005; operators pay for and must carry out the specified replacement work. CASA issued the directive after the manufacturer set a 5,000-hour life limit for these bolts."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly referenced (Alert Service Bulletin)","Single, unambiguous compliance requirement with clear deadline","No nested exceptions or conditional logic — only one exemption ('unless already accomplished')","Minimal cross-referencing (only to Transport Canada AD and the specific service bulletin)","Straightforward applicability criteria (specific model and serial number range)"],"plain_english_summary":"Owners/operators of Bell 430 helicopters (S/N 49001–49106) must replace three servo-actuator attachment bolts per Bell Helicopter Alert Service Bulletin 430-05-33 and update maintenance manual chapters 4 and 5. Work is required within 150 flight hours after 27 Oct 2005 or by 31 Dec 2005, whichever is earlier (or not required if already done). The AD prevents bolt failure—potential loss of control—by enforcing a 5,000‑hour life limit."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-430-4-servo-actuator-bolts","history":"/api/acts/ad-bell-430-4-servo-actuator-bolts/history","analysis":"/api/acts/ad-bell-430-4-servo-actuator-bolts/analysis","conflicts":"/api/acts/ad-bell-430-4-servo-actuator-bolts/conflicts","importantCases":"/api/acts/ad-bell-430-4-servo-actuator-bolts/important-cases","documents":"/api/acts/ad-bell-430-4-servo-actuator-bolts/documents"}}