{"id":"F2009L03199","name":"AD/BELL 407/37 - Flight Control Bearings","slug":"ad-bell-407-37-flight-control-bearings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140516,"registerId":"commonwealth-F2009L03199-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 40","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters\n\n| AD/BELL 407/37 | Flight Control Bearings | 10/2009 TX |\n| -------------- | ----------------------- | ---------- |\n\n| Applicability: | Bell Helicopter Textron Canada (BHTC) 407 Helicopters Serial number 53000 through 53887, 53890 through 53916, 53918, 53920, 53921, 53923 through 53926 and 53928.                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Perform a one-time inspection and, if required, rectification of the affected parts as per Accomplishment Instructions of BHTC Alert Service Bulletin 407-09-88 dated7 April 2009, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.Note: Transport Canada AD CF-2009-32 dated 24 July 2009 refers.           |\n| Compliance:    | Within the next 10 flight hours, but not later than 30 calendar days from the effective day of this AD, unless already accomplished.                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 14 August 2009.                                                                                                                                                                                                                                                                                 |\n| Background:    | It has been determined that some bearings may not have been staked as required. Consequently, the functionality of affected parts may be limited. This situation, if not corrected, could lead to loss of control of the helicopter.BHTC Operational Safety Notice OSN GEN-09-38 dated 7 April 2009 provides further information on this subject. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 August 2009","sortOrder":0},{"sectionNumber":"AD/BELL 407/37","sectionType":"part","heading":"AD/BELL 407/37","content":"## AD/BELL 407/37","sortOrder":1},{"sectionNumber":"Flight Control Bearings","sectionType":"part","heading":"Flight Control Bearings","content":"## Flight Control Bearings","sortOrder":2},{"sectionNumber":"10/2009 TX","sectionType":"part","heading":"10/2009 TX","content":"## 10/2009 TX","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific manufacturing defect in a specific helicopter model. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical issue (bearing staking)","Clear applicability list by serial number (no conditional logic)","Single compliance action with straightforward deadline (10 flight hours OR 30 days)","References only one external document (Bell service bulletin 407-09-88)","No defined terms section, no nested exceptions, no cross-references to other legislation","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive orders a one‑time urgent inspection of flight‑control bearings on specified Bell 407 helicopters (serials 53000–53887, 53890–53916, 53918, 53920–53921, 53923–53926, 53928) and requires any defects be corrected per Bell service bulletin 407‑09‑88.  \n\nUnstaked bearings could fail and cause loss of control; owners/operators must comply within 10 flight hours or 30 days of the effective date (14 August 2009)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope, as written, matches its stated purpose: to inspect and rectify flight control bearings on the listed Bell 407 serial numbers. The instrument sets a one‑time mandatory inspection and corrective action requirement and does not expand or narrow that purpose beyond the text provided."},"complexity_factors":["Narrow applicability limited to specific serial-numbered Bell 407 helicopters (clear scope)","Single one-time action (inspection and, if required, rectification) reduces procedural complexity","References an external BHTC Alert Service Bulletin for detailed steps (requires cross-referencing)","Allows later revisions only if approved by the Chief, Continuing Airworthiness (administrative approval point)","Short compliance window (10 flight hours or 30 days) creates operational scheduling pressure for operators","Possible unspecified rectification actions may vary by defect severity and increase logistical burden"],"plain_english_summary":"Requires operators of the listed Bell 407 helicopters (specific serial numbers) to carry out a one‑time inspection of flight‑control bearings and to repair or replace any faulty parts following BHTC Alert Service Bulletin 407‑09‑88 (or later revisions approved by the Chief, Continuing Airworthiness). Work must be completed within 10 flight hours or 30 calendar days of the AD taking effect. The directive responds to findings that some bearings may not have been staked correctly and could limit control functionality."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-407-37-flight-control-bearings","history":"/api/acts/ad-bell-407-37-flight-control-bearings/history","analysis":"/api/acts/ad-bell-407-37-flight-control-bearings/analysis","conflicts":"/api/acts/ad-bell-407-37-flight-control-bearings/conflicts","importantCases":"/api/acts/ad-bell-407-37-flight-control-bearings/important-cases","documents":"/api/acts/ad-bell-407-37-flight-control-bearings/documents"}}