{"id":"F2018L01026","name":"AD/BELL 214/10 Main Rotor Drag Brace Assembly","slug":"ad-bell-214-10-main-rotor-drag-brace-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":97728,"registerId":"commonwealth-F2018L01026-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 214B and 214B-1 ","sectionType":"part","heading":"Bell Helicopter Textron 214B and 214B-1 Series Helicopters","content":"# Bell Helicopter Textron 214B and 214B-1 Series Helicopters\n\n| AD/BELL 214/10 | Main Rotor Drag Brace Assembly | 14/2018 |\n| -------------- | ------------------------------ | ------- |\n\n| Applicability: | Bell Helicopter Textron Inc. (BHTI) model 214B and 214B-1 helicopters.                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Inspect main rotor drag brace assembly, Part Number (P/N) 214-010-113-001 or 214-010-113-003, in accordance with BHTI Alert Service Bulletin 214-85-28 dated 3 September 1985, as in force from time to time (BHTI Service Bulletin).2. If, while carrying out the Requirement 1 inspection, cracks are found, or if corrosion is found which cannot be removed within the limits of the rework criteria in the BHTI Service Bulletin, replace with serviceable parts.Note: FAA AD 85-18-06 refers. |\n| Compliance:    | 1. Within the next 10 hours' time in service, unless previously accomplished, and thereafter at intervals not to exceed 250 hours’ time in service.2. Before further flight.                                                                                                                                                                                                                                                                                                                           |\n|                | This AD commences on 17 July 2018.                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | This AD requires repetitive visual and magnetic particle inspections of the main rotor drag brace assembly for corrosion and cracks. The actions specified in this Directive are intended to prevent failure of the main rotor drag brace and subsequent loss of control of the helicopter.                                                                                                                                                                                                            |\n\n![](image.001.jpeg)\n\nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n10 July 2018","sortOrder":0},{"sectionNumber":"AD/BELL 214/10","sectionType":"part","heading":"AD/BELL 214/10","content":"## AD/BELL 214/10","sortOrder":1},{"sectionNumber":"Main Rotor Drag Brace Assembly","sectionType":"part","heading":"Main Rotor Drag Brace Assembly","content":"## Main Rotor Drag Brace Assembly","sortOrder":2},{"sectionNumber":"14/2018","sectionType":"part","heading":"14/2018","content":"## 14/2018","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in a specific helicopter model's main rotor drag brace assembly. It has not expanded beyond its original purpose of preventing drag brace failure through mandated inspections."},"complexity_factors":["Short, single-purpose document focused on one mechanical component","Only 2 defined part numbers to identify applicability","Simple conditional structure: inspect → if problem found → replace","Clear compliance timeline (10 hours initial, 250 hours recurring)","References external technical document (Bell service bulletin) but does not reproduce its contents","No nested exceptions or complex cross-referencing within the instrument itself","Standard AD format with familiar sections (Applicability, Requirement, Compliance, Background)"],"plain_english_summary":"This CASA Airworthiness Directive applies to Bell 214B and 214B‑1 helicopters and mandates inspection of the main rotor drag brace assembly (per Bell ASB 214‑85‑28) for cracks and corrosion, with replacement required if defects can’t be removed.\n\nIt affects owners/operators/mechanics of affected helicopters in Australia, requires first inspection within 10 flight hours and repeats every 250 hours, and prevents catastrophic loss of rotor control by catching structural failures early."},"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":3,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with the text: it applies only to Bell 214B and 214B‑1 helicopters and to the specified drag brace part numbers, mandating inspection and replacement per the Bell Alert Service Bulletin. It does not broaden applicability to other models or components nor add obligations beyond inspection frequency, defect-based replacement, and the cited service bulletin (Applicability; Requirement; Compliance)."},"complexity_factors":["Technical inspection methods: requires both visual and magnetic particle inspections (Requirement; Background).","External-document dependence: compliance hooks to the Bell Alert Service Bulletin 'as in force from time to time', creating ongoing reliance on updated manufacturer guidance (Requirement).","Judgement-driven criteria: operators/maintenance must determine if corrosion can be removed within rework limits or if replacement is required (Requirement).","Operational scheduling: short initial compliance window (10 hours TIS) and recurring 250‑hour intervals impose planning and potential downtime (Compliance).","Parts specificity and logistics: only two part numbers are covered, so availability and replacement cost fall on owners/operators (Applicability; Requirement).","Regulatory enforcement timing: AD commencement date and mandatory nature create administrative compliance obligations for certificate holders (Compliance).","Safety consequence focus: failure mode identified as loss of control, which raises compliance priority and potential for stricter oversight (Background)."],"plain_english_summary":"This airworthiness directive requires operators of Bell 214B and 214B‑1 helicopters to inspect the main rotor drag brace assembly (P/N 214-010-113-001 or 214-010-113-003) per the Bell Alert Service Bulletin and to replace parts if cracks or unremovable corrosion are found. Inspections are due within 10 hours' time-in-service and then every 250 hours; defects must be repaired or parts replaced before further flight. The AD is presented as safety-driven to prevent drag brace failure and loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly","history":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly/history","analysis":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly/analysis","conflicts":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly/conflicts","importantCases":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly/important-cases","documents":"/api/acts/ad-bell-214-10-main-rotor-drag-brace-assembly/documents"}}