{"id":"F2006B01821","name":"AD/A109/35 - Hydraulic Hoses","slug":"ad-a109-35-hydraulic-hoses","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41019,"registerId":"commonwealth-F2006B01821-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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\nAgusta A109 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/A109/35 Hydraulic Hoses 4/2003","sectionType":"part","heading":"AD/A109/35 Hydraulic Hoses 4/2003","content":"# AD/A109/35 Hydraulic Hoses 4/2003\n\nApplicability: All A109E helicopters fitted with Pratt and Whitney PW206C engine from serial number (S/N) 11001 to 11137 inclusive, and S/N 11151.\n\nAll A109E helicopters, fitted with Turbomeca TM2K1 engine from S/N 11501 to 11505 inclusive.\n\nRequirement: Carry out inspection and fitment of clamps in accordance with Agusta Bollettino Tecnico 109EP-29.\n\nNote: Italian AD 2002-318 refers.\n\nCompliance: Within 50 flight hours from the effective date of this Directive or by 30 June 2003, whichever comes first.\n\nThis Airworthiness Directive becomes effective on 17 April 2003.\n\nBackground: A small hydraulic leak was observed during a ground check. Investigation revealed chafing of the hoses caused the leakage. This Directive requires the fitment of clamps to separate the hoses.\n\n![](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 5 March 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 March 2003.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific hydraulic hose chafing issue on specific Agusta A109E helicopter variants. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined applicability criteria (engine type + serial number ranges)","Single requirement with clear reference to external technical standard","Simple compliance deadline (whichever comes first of two dates)","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward background explaining the safety issue in plain language"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and installation of clamps on hydraulic hoses of certain Agusta A109E helicopters (specific Pratt & Whitney PW206C and Turbomeca TM2K1 engine serials) because hose chafing caused leaks that threaten flight-critical hydraulics. Work must be done per Agusta Bollettino Tecnico 109EP-29 within 50 flight hours of 17 April 2003 or by 30 June 2003. Compliance is legally required."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not indicate any change from its stated applicability. It applies only to specified A109E serial numbers and engine fits and limits required action to inspection and clamp fitment per the referenced Agusta technical bulletin."},"complexity_factors":["Applicability: precise serial-number and engine-type limits (PW206C S/N 11001–11137 and 11151; TM2K1 S/N 11501–11505) increase tracking and identification burden.","Requirement: mandates actions 'in accordance with Agusta Bollettino Tecnico 109EP-29' — relies on an external manufacturer document for procedural detail.","Compliance: short deadline (within 50 flight hours or by 30 June 2003) creates scheduling and operational constraints for operators.","Background/technical: root cause is hose chafing discovered on ground; corrective action (fitment of clamps) is mechanically simple but requires physical access and maintenance resources.","Authority: issued under CAR 1998 subregulation 39.1(1) by a CASA delegate — regulatory discretion exercised at delegation level.","Cross-reference: notes Italian AD 2002-318 — indicates international regulatory alignment but requires operators to follow Australian AD wording."],"plain_english_summary":"This Airworthiness Directive requires inspection and installation of clamps to stop hydraulic-hose chafing on specified Agusta A109E helicopters (certain Pratt & Whitney PW206C and Turbomeca TM2K1 serial-number ranges). \n\nIt affects aircraft owners/operators, who must carry out the work in accordance with Agusta Bollettino Tecnico 109EP-29 within 50 flight hours or by 30 June 2003. CASA issued the AD under CAR 1998 subregulation 39.1(1)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-a109-35-hydraulic-hoses","history":"/api/acts/ad-a109-35-hydraulic-hoses/history","analysis":"/api/acts/ad-a109-35-hydraulic-hoses/analysis","conflicts":"/api/acts/ad-a109-35-hydraulic-hoses/conflicts","importantCases":"/api/acts/ad-a109-35-hydraulic-hoses/important-cases","documents":"/api/acts/ad-a109-35-hydraulic-hoses/documents"}}