{"id":"F2006B04463","name":"AD/BELL 206/148 Amdt 1 - Chip Detector Assembly","slug":"ad-bell-206-148-amdt-1-chip-detector-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44300,"registerId":"commonwealth-F2006B04463-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/148 Amdt 1 - Chip Detector Assembly","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n![](image.002.png)  \nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.003.png)For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/Bell 206/148 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nApplicability: Bell Helicopter Textron Canada (BHTC) Model 206A, 206B and 206L and Agusta- Bell AB206A and AB206B series helicopters, equipped with Eaton Tedeco Products B3188B and B4093 chip detector assemblies.\n\nRequirement: 1. Unless already accomplished, verify and repair Tedeco chip detectors as follows:\n\n    For Bell 206A and 206B helicopters \\- Perform a continuity test and temporary repair in accordance with BHTC Alert Service Bulletin (ASB) 206- 01-96 Revision A.\n\n    b. For Bell 206L helicopters \\- Perform a continuity test and temporary repair in accordance with BHTC ASB 206L-01-119, Revision A.\n\n    c. For Agusta-Bell AB206A and AB206B helicopters \\- Perform a continuity test and temporary repair in accordance with Agusta Mandatory Bollettino Tecnico 206-235.\n\n    2. Spare chip detector assemblies may not be installed on any helicopter unless they have been checked in accordance with the appropriate ASB or the Bollettino Tecnico.\n\n    3. If the chip detector assemblies are repaired in accordance with either Requirement 1.a., 1.b. or 1.c. replace them with new chip detectors.\n\n![](image.004.png)Note: Transport Canada AD CF-2001-33 and Enac (Italy) AD 2001-401 refer.\n\nCompliance: For Requirement 1 \\- Remains unchanged as “Within 60 days from the effective date of the original issue of this Directive”.\n\nFor Requirement 2 \\- As of the effective date of this Directive\n\nFor Requirement 3 \\- Remains unchanged as “Within 300 hours time in service after the repairs were effected, but no later than 31 March 2002”.\n\nThis Amendment becomes effective on 14 November 2001.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nAD/BELL 206/148 Amdt 1 (Continued)\n\nBackground: Transport Canada has advised that BHTC has become aware that Tedeco B3188B and B4093 chip detectors installed on Model 206A, 206B and 206L Series helicopters could have poor or no continuity between the insert and the chip detector housing.\n\nThis could result in no chip indication when the chip detector has been bridged by metal particles.\n\nThe original issue of this Directive required a continuity test and temporary repair of the affected chip detectors and, if necessary, their replacement.\n\nThis amendment introduces the same requirements for AB206A and AB206B helicopters manufactured by Agusta.\n\nThe original issue of this Airworthiness Directive became effective on 17 October 2001.\n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 1 November 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 November 2001.","sortOrder":0}],"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":4,"scope_assessment":{"changed":true,"description":"The amendment expanded the applicability to include Agusta‑Bell AB206A and AB206B helicopters (see Requirement 1.c and Background). Other substantive requirements (continuity test, temporary repair, ban on unchecked spares, replacement within 300 hours/by 31 March 2002) remain as in the original directive."},"complexity_factors":["Multiple helicopter models and two specific detector part numbers in the applicability (Applicability).","Dependence on external manufacturer service documents (BHTC ASB 206-01-96 Rev A, ASB 206L-01-119 Rev A, Agusta Bollettino Tecnico 206-235) to set the technical test and repair method (Requirement 1).","Staged compliance timing: Requirement 1 within 60 days, Requirement 2 effective immediately, Requirement 3 within 300 hours or by a calendar date (Compliance).","Prohibition on installing spare detectors unless checked increases parts-handling and recordkeeping burden for maintenance organisations (Requirement 2).","Temporary repair plus mandatory replacement rule creates logistics and supply pressure to procure new detectors within a service-time limit (Requirement 3).","Cross-references to foreign airworthiness directives (Transport Canada AD CF-2001-33, ENAC AD 2001-401) and revocation/amendment of an earlier AD add administrative coordination tasks (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of Bell 206 series and Agusta‑Bell AB206 helicopters fitted with Eaton Tedeco B3188B or B4093 chip detectors to perform continuity tests and temporary repairs per the manufacturer service bulletins, prohibits installing unchecked spare detectors, and mandates replacement of any repaired detector within 300 flight hours or by 31 March 2002. It affects owners, operators and maintenance organisations because poor detector continuity can prevent chip warnings and so imposes inspection, repair and replacement obligations."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This is Amendment 1 to an existing directive. The original AD only covered Bell helicopters manufactured by Bell Helicopter Textron Canada. This amendment expands the scope to include Agusta-Bell AB206A and AB206B helicopters manufactured by Agusta (an Italian company), effectively broadening the safety order to cover additional aircraft that use the same faulty chip detector components."},"complexity_factors":["Multiple applicability categories requiring different technical procedures (3 distinct manufacturer bulletins referenced)","Three separate compliance deadlines with different trigger events (days from original issue, immediate effective date, hours-in-service with calendar cap)","Cross-references to foreign aviation authorities (Transport Canada AD CF-2001-33, Italian ENAC AD 2001-401)","Conditional logic: 'Unless already accomplished' exemption for Requirement 1","Nested requirements: Requirement 3 only applies if repairs done under Requirements 1.a, 1.b, or 1.c","Technical aviation terminology requiring specialized knowledge (chip detectors, continuity tests, time in service, Alert Service Bulletins)"],"plain_english_summary":"Owners/operators of Bell 206A/B/L and Agusta‑Bell AB206A/B helicopters fitted with Eaton Tedeco B3188B or B4093 chip detectors must inspect, temporarily repair as needed, and ultimately replace those detectors because poor electrical continuity can prevent metal‑particle warnings. The AD bans installing unchecked spares, requires prompt testing/repairs, and mandates replacement within 300 flight hours or by 31 March 2002 to prevent undetected engine damage."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly","history":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly/history","analysis":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly/analysis","conflicts":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly/conflicts","importantCases":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly/important-cases","documents":"/api/acts/ad-bell-206-148-amdt-1-chip-detector-assembly/documents"}}