{"id":"F2006L00366","name":"AD/BELL 427/1 - In-line Electrical Terminal Junctions","slug":"ad-bell-427-1-in-line-electrical-terminal-junctions","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116983,"registerId":"commonwealth-F2006L00366-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 427 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 427 Series Helicopters","content":"### Bell Helicopter Textron 427 Series Helicopters\n\n| AD/BELL 427/1 | In-line Electrical Terminal Junctions | 3/2006 |\n| ------------- | ------------------------------------- | ------ |\n\n| Applicability: | Model 427 helicopters serial number (S/N) 56001 through 56030 and S/N 58001.                                                                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | If not previously accomplished, replace M81714/65 series in-line electrical terminal junctions in accordance with Bell Helicopter Textron Canada ((BHTC) Alert Service Bulletin (ASB) 427-01-06 dated 5 November 2001, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. |\n|                | Note: Transport Canada AD CF-2002-24 refers.                                                                                                                                                                                                                                                                 |\n| Compliance:    | Within 30 days after the effective date of this Directive.                                                                                                                                                                                                                                                   |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                             |\n| Background:    | Transport Canada has advised fuel spillage can cause degradation of the insulation within M81714/65 series in-line electrical terminal junctions. To prevent these junctions from being a potential source of ignition when exposed to fuel, this Directive requires the junctions are to be replaced.       |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/BELL 427/1","sectionType":"part","heading":"AD/BELL 427/1","content":"## AD/BELL 427/1","sortOrder":1},{"sectionNumber":"In-line Electrical Terminal Junctions","sectionType":"part","heading":"In-line Electrical Terminal Junctions","content":"## In-line Electrical Terminal Junctions","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","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 safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating replacement of faulty electrical junctions."},"complexity_factors":["Single, unambiguous requirement (replace specific parts)","Only 31 aircraft affected (narrow, clearly defined applicability)","No defined terms section — uses plain technical language","Single cross-reference to Canadian service bulletin and Transport Canada AD","No conditional logic or exceptions — straightforward 'if not already done, do this' structure","Very short document (approximately 150 words of substantive content)"],"plain_english_summary":"This AD mandates replacement of M81714/65-series in-line electrical terminal junctions on 31 Bell 427 helicopters (S/N 56001–56030 and 58001) within 30 days to eliminate a fuel-on-connector condition that can degrade insulation and cause sparks, fire or explosion.  \n\nCompliance follows Bell Alert Service Bulletin 427-01-06 (or later approved revisions); the AD adopts Transport Canada CF-2002-24."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies only to the listed Bell 427 serial numbers and mandates replacement of a specified part per a named ASB; it does not expand the population affected or the action required beyond that original specification. Allowing later ASB revisions (subject to Chief approval) adjusts acceptable compliance method but does not change the set of affected helicopters or the replacement requirement."},"complexity_factors":["Narrow applicability limited to specific serial numbers requires operators to check airframe S/N (Applicability).","Mandated action is a parts replacement following an external service bulletin (ASB 427‑01‑06) and allows later Chief‑approved revisions, creating a dependency on another document and regulator approval (Requirement).","Short compliance window of 30 days imposes time pressure on operators to source parts and schedule certified maintenance (Compliance).","Work is technical electrical maintenance likely requiring licensed maintenance personnel and parts availability, which can create operational downtime and cost (Requirement / Background).","Reference to Transport Canada AD CF‑2002‑24 and Transport Canada approval centralises decision on acceptable revisions, reducing local regulator discretion (Note / Requirement)."],"plain_english_summary":"This directive requires owners/operators of Bell 427 helicopters S/N 56001–56030 and S/N 58001 to replace M81714/65 series in-line electrical terminal junctions in accordance with Bell ASB 427‑01‑06 (or a later revision approved by the Chief, Continuing Airworthiness, Transport Canada). Transport Canada warned fuel spillage can degrade the junction insulation and create an ignition risk; affected operators must complete the replacement within 30 days of the directive (effective 16 March 2006), arranging and paying for the maintenance and parts."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions","history":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions/history","analysis":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions/analysis","conflicts":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions/conflicts","importantCases":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions/important-cases","documents":"/api/acts/ad-bell-427-1-in-line-electrical-terminal-junctions/documents"}}