{"id":"F2007L02450","name":"AD/BELL 222/34 Amdt 1 - Tail Rotor Counterweight Bellcrank","slug":"ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67923,"registerId":"commonwealth-F2007L02450-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 22","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters\n\n| AD/BELL 222/34 Amdt 1 | Tail Rotor Counterweight Bellcrank | 9/2007 |\n| --------------------- | ---------------------------------- | ------ |\n\n| Applicability: | Model 222 helicopters, serial numbers 47006 through 47089.Model 222B helicopters, serial numbers 47131 through 47156.Model 222U helicopters, serial numbers 47501 through 47574.Model 230 helicopters, serial numbers 23001 through 23038.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Identify the part number of the tail rotor counterweight bellcrank installed on the helicopter and proceed as follows:If part number 222-012-727-003 is installed, proceed to Requirement 3.If part number 222-012-727-105 without the prefix letters is installed, proceed to Requirement 2.Note 1: Part number 222-012-727-105, with the added prefix letters inscribed on the part before the serial number, satisfies the requirement of this Directive.2. Inspect the tail rotor counterweight bellcrank in accordance with Part I of Bell Helicopter Textron Canada Alert Service Bulletin (ASB) 222-04-101 Revision B, for Models 222 and 222B, Part I of ASB 222U-04-72 Revision B, for Model 222U, and Part I of ASB 230-04-32 Revision B, for Model 230.3. Remove from service, tail rotor counterweight bellcrank part numbers222-012-727-003 and 222-012-727-105 (without prefix letters), in accordance with the following Alert Service Bulletin:Models 222 and 222B helicopters with the following bellcranks:- Part number 222-012-727-105 bellcranks installed; in accordance with Part II of ASB 222-04-101 Revision A.- Part number 222-012-727-003 bellcranks installed; in accordance with ASB 222-04-99 Revision B. |\n\n|             | Model 222U helicopters with the following bellcranks:- Part number 222-012-727-105 bellcranks installed; in accordance with Part II of ASB 222U-04-72 Revision A.- Part number 222-012-727-003 bellcranks installed; in accordance with ASB 222U-04-70 Revision B.Model 230 helicopters with the following bellcranks:- Part number 222-012-727-105 bellcranks installed; in accordance with Part II of ASB 230-04-32 Revision B.- Part number 222-012-727-103 bellcranks installed; in accordance with ASB 230-04-30 Revision C.Note 2: Transport Canada AD CF-2005-27R1 refers. |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. Within 10 flight hours after 19 August 2005.2. Within 10 flight hours after 19 August 2005. Repeat thereafter at intervals not to exceed 50 flight hours, until compliance with Requirement 3.3. Unless already accomplished, before 30 September 2007.The compliance times for Requirements 1 and 2 remain unchanged by this issue of the Directive.                                                                                                                                                                                                                          |\n|             | This Amendment becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background: | The manufacturer has determined that tail rotor counterweight bellcrank part numbers 222-012-727-003 and 222-012-727-105 may have manufacturing discrepancies, which can result in an in-flight failure. BHTC also has identified certain correctly manufactured parts that are not affected.Amendment 1 is issued to include the Model 230 helicopter in applicability and change the compliance time for Requirement 3.                                                                                                                                                         |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n10 July 2007","sortOrder":0},{"sectionNumber":"AD/BELL 222/34 Amdt 1","sectionType":"part","heading":"AD/BELL 222/34 Amdt 1","content":"## AD/BELL 222/34 Amdt 1","sortOrder":1},{"sectionNumber":"Tail Rotor Counterweight Bellcrank","sectionType":"part","heading":"Tail Rotor Counterweight Bellcrank","content":"## Tail Rotor Counterweight Bellcrank","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Amendment 1 expanded the directive's applicability to include Model 230 helicopters and revised the compliance timing for Requirement 3; the directive states that compliance times for Requirements 1 and 2 remain unchanged."},"complexity_factors":["Multiple helicopter models and distinct serial number ranges listed in applicability, increasing scope of affected operators.","Decision tree based on installed part number (222-012-727-003 vs 222-012-727-105, with a prefix-letter exception), creating conditional obligations.","Different mandatory actions (inspect vs remove) and different manufacturer Alert Service Bulletins (ASB) and specific revisions referenced per model/part.","Staggered and short compliance windows (initial 10 flight hours; repeat every 50 flight hours until removal; final removal by a deadline) creating operational scheduling pressure.","Amendment modifies applicability and timing (adds Model 230 and changes Requirement 3 timing), requiring operators to reconcile versions and dates.","Cross-reference to an overseas AD (Transport Canada AD CF-2005-27R1) and multiple ASB revision levels adds regulatory dependence on external documents.","Ongoing compliance burden for repeated inspections until part removal increases direct maintenance costs and aircraft downtime.","Removal-from-service requirement imposes parts-replacement costs and logistical decisions about sourcing acceptable replacement parts (including identifying parts with prefix letters)."],"plain_english_summary":"This directive requires operators of specified Bell 222-series and newly included Model 230 helicopters to identify tail‑rotor counterweight bellcrank part numbers, inspect suspect parts per Bell Alert Service Bulletins, and remove non‑conforming units. Operators/owners must carry out short-deadline actions (identification and initial inspection within 10 flight hours, repeated inspections every 50 flight hours until removal, and final removal by the stated deadline) and therefore bear the inspection and replacement costs; Amendment 1 adds Model 230 and alters the removal timing."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original directive (implied by 'Amendment 1') did not include Model 230 helicopters. This amendment expands the scope to cover an additional helicopter model (Model 230) and extends the compliance deadline for Requirement 3 (removal from service). The background explicitly states these changes."},"complexity_factors":["Multiple conditional pathways based on part numbers and helicopter models (4 different model variants with different service bulletins)","Cross-references to 6 different Alert Service Bulletins (ASBs) with specific revision letters (A, B, C)","Nested compliance requirements: Requirement 1 leads to 2 or 3; Requirement 2 requires ongoing inspections until Requirement 3 is completed","Specific serial number ranges for each model variant (4 separate applicability lists)","Distinguishing between part numbers with and without prefix letters (subtle but critical distinction)","Three-tier compliance timeline with different deadlines for identification, inspection, and replacement"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and replacement of certain tail‑rotor counterweight bellcranks on Bell 222, 222B, 222U and now Model 230 helicopters (specific serials listed) due to manufacturing defects that could cause in‑flight failure. Operators and maintenance organisations must identify, inspect promptly and replace affected parts by the revised deadline to prevent loss of tail‑rotor control and potential accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank","history":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank/history","analysis":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank/analysis","conflicts":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank/conflicts","importantCases":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank/important-cases","documents":"/api/acts/ad-bell-222-34-amdt-1-tail-rotor-counterweight-bellcrank/documents"}}