{"id":"F2006B04714","name":"AD/BELL 47/92 Amdt 5 - Main Rotor Blade Grips","slug":"ad-bell-47-92-amdt-5-main-rotor-blade-grips","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44478,"registerId":"commonwealth-F2006B04714-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BELL 47/92 Amdt 4 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.","sortOrder":0},{"sectionNumber":"AD/BELL 47/92","sectionType":"part","heading":"AD/BELL 47/92","content":"# AD/BELL 47/92\n\nAmdt 5\n\nApplicability: All models.","sortOrder":1},{"sectionNumber":"Main Rotor Blade Grips 2/2001 TX","sectionType":"part","heading":"Main Rotor Blade Grips 2/2001 TX","content":"# AD/BELL 47/92\n\nAmdt 5\n\nApplicability: All models.\n\n  \n\n# Main Rotor Blade Grips 2/2001 TX","sortOrder":2}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the AD/BELL 47/92 series. It continues to address main rotor blade grips on Bell 47 helicopters. The 'All models' applicability suggests the scope was already broad (covering the entire type), and Amendment 5 appears to be a routine update rather than an expansion into new aircraft types or components."},"complexity_factors":["Short, single-purpose instrument (approximately 200 words)","Only 1 defined term implicitly referenced (AD/BELL 47/92 itself)","Simple structure: revocation of previous amendment, applicability statement, and reference to requirement/compliance sections","No nested conditional logic or cross-references to other legislation beyond the basic CAR 1998 subregulation citation","Highly specific technical scope (single aircraft type, single component)","Standardised CASA AD template format reduces parsing complexity"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- **Revokes** the previous version (Amendment 4) of this directive\n- **Issues a new, updated version** (Amendment 5) that applies to **all models** of Bell 47 helicopters\n- Requires specific safety actions to be taken on the **main rotor blade grips** — a critical component that holds the rotor blades to the helicopter's hub\n\n**Why it matters:**\nMain rotor blade grips are essential for flight safety. If they fail, the rotor blades can detach, causing catastrophic loss of control. This AD mandates inspections, repairs, or replacements to address an identified **unsafe condition**.\n\n**Who it affects:**\n- Owners and operators of **all Bell 47 helicopter models**\n- Maintenance engineers and organisations servicing these aircraft\n- Anyone responsible for keeping these helicopters airworthy\n\n**What must happen:**\nThe directive requires specific actions (detailed in separate sections not fully shown here) to be carried out:\n- When particular circumstances apply\n- Following specific instructions\n- By deadlines set out in the compliance section\n\nThis is **not optional** — compliance is legally required to keep the aircraft certified to fly."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"The instrument revokes AD/BELL 47/92 Amdt 4 and issues AD/BELL 47/92 Amdt 5 (opening paragraph). The replacement AD is explicitly applicable to \"All models.\" The supplied text does not include the prior AD text or the new requirement/compliance details, so while the document clearly replaces the prior amendment, the specific substantive changes to obligations, timings, or technical requirements cannot be determined from the excerpt provided."},"complexity_factors":["Key operative details (the requirement section and the compliance section) are not included in the supplied text, creating uncertainty about substantive obligations.","Broad applicability statement (\"All models\") expands the potential affected population and complicates impact estimation.","The instrument revokes a prior amendment (Amdt 4) and issues a replacement (Amdt 5), so implementers must compare versions to identify changes.","Authority is exercised under a specific regulation (subregulation 39.1(1) of CAR 1998), indicating delegated administrative decision-making rather than a purely legislative prescription.","Administrative language ties compliance to multiple locations in the AD (background, requirement, compliance sections), requiring cross-referencing to understand duties and deadlines."],"plain_english_summary":"The CASA delegate has revoked AD/BELL 47/92 Amdt 4 and issued AD/BELL 47/92 Amdt 5 under subregulation 39.1(1) of CAR 1998. It applies to all models and requires specified corrective actions and timing to address an identified unsafe condition.\n\nAircraft owners/operators must carry out the mandated actions and bear associated costs; the excerpt omits the detailed requirement and compliance text, so operators must consult the full AD for technical steps and deadlines."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips","history":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips/history","analysis":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips/analysis","conflicts":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips/conflicts","importantCases":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips/important-cases","documents":"/api/acts/ad-bell-47-92-amdt-5-main-rotor-blade-grips/documents"}}