{"id":"F2006B01812","name":"AD/A109/27 - Tail Rotor Blades P/N 109-8132-01-107","slug":"ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41010,"registerId":"commonwealth-F2006B01812-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A109/27 - Tail Rotor Blades P/N 109-8132-01-107","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 7/1997,Rotorcraft,Agusta A109 Series Helicopters,Tail Rotor Blades P/N 109-8132-01-107,27\ntitle: Airworthiness Directive - AD/A109/27 - Tail Rotor Blades P/N 109-8132-01-107\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Agusta A109 Series Helicopters\n\n \n\nAD/A109/27 Tail Rotor Blades P/N 109-8132-01-107 7/97\n\nDM\n\nApplicability: Model A109C with tail rotor blades Part Number 109-8132-01-107 with Serial Numbers prefixed A5- installed.\n\n \n\nRequirement: Action in accordance with Agusta Bullettino Technico 109-105.\n\n \n\nNote: RAI AD 97-090 refers.\n\n \n\nCompliance: Within 25 hours time in Service after 12 May 1997.\n\n \n\nThis Airworthiness Directive becomes effective on 12 May 1997.\n\n \n\nBackground: This Directive is raised to inspect the bonding of the tail rotor blades tip fairing for voids and disbonding. Loss of a tip fairing will cause severe vibration, and may cause severe structural damage that may result in loss of control.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — a targeted safety inspection for a specific helicopter model with specific tail rotor blades. There is no evidence of scope creep; it does exactly what it was designed to do when issued."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined applicability criterion (specific part number and serial number prefix)","Single, straightforward requirement referencing an external technical document","Simple compliance deadline (25 hours time in service after fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation","Clear, singular purpose with no ancillary provisions"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators of Agusta A109C helicopters with tail rotor blades P/N 109-8132-01-107 and S/Ns beginning \"A5-\" inspect the tip fairing bonding per Agusta Bullettino Technico 109-105.  \n\nThe fairing can detach, causing severe vibration, structural damage and potential loss of control; the inspection must be done within 25 flight hours after 12 May 1997 and is legally required."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive’s scope is confined to Agusta A109C helicopters with tail rotor blades P/N 109-8132-01-107 (serials prefixed A5-) and prescribes inspection per the Agusta bulletin. The text gives no indication the scope has been expanded or narrowed from its stated intent; it specifies applicability, required action, and compliance time."},"complexity_factors":["Narrow applicability: single helicopter model and specific part/serial numbers (Applicability).","Clear required action: follow Agusta Bullettino Technico 109-105 to inspect bonding (Requirement).","Short compliance window: 25 hours time-in-service after 12 May 1997 (Compliance).","Reliance on external manufacturer bulletin for technical details (Requirement).","Safety-critical consequences described (Background), increasing enforcement attention but not procedural complexity.","Limited regulatory discretion: directive prescribes action and deadline rather than options."],"plain_english_summary":"This Airworthiness Directive requires operators of Agusta A109C helicopters fitted with tail rotor blades P/N 109-8132-01-107 (serials prefixed A5-) to inspect the tail rotor blade tip fairing bonding for voids or disbonding, following Agusta Bullettino Technico 109-105. Compliance must occur within 25 hours time-in-service after 12 May 1997.\n\nOperators pay for inspections and any repairs; the Civil Aviation Safety Authority enforces compliance. The Directive’s stated purpose is to prevent tip-fairing loss that can cause severe vibration or structural damage, so it changes immediate maintenance priorities and creates a short-term compliance burden."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107","history":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107/history","analysis":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107/analysis","conflicts":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107/conflicts","importantCases":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107/important-cases","documents":"/api/acts/ad-a109-27-tail-rotor-blades-p-n-109-8132-01-107/documents"}}