{"id":"F2006B01830","name":"AD/A109/44 - Main Transmission Support Fittings","slug":"ad-a109-44-main-transmission-support-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41028,"registerId":"commonwealth-F2006B01830-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\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 CASR 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\n![](image.001.png)  \n\nAgusta A109 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/A109/44 Main Transmission Support Fit","sectionType":"part","heading":"AD/A109/44 Main Transmission Support Fittings 7/2003","content":"# AD/A109/44 Main Transmission Support Fittings 7/2003\n\nApplicability: Model 109E helicopters with serial numbers up to and including 11069, excluding serial numbers 11049, 11055, 11056, and 11067.\n\nRequirement: Action in accordance with Agusta Service Bulletin No. 109EP-7.\n\nNote: ENAC AD 2000-128 refers.\n\nCompliance: Before 31 July 2003, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 10 July 2003.\n\nBackground: Reports have been received of several cases of failure of the aft fitting of the main transmission support installation, in the attachment area of the support link. This Directive requires replacement of the aluminium fittings with improved steel fittings.\n\n![](image.002.jpeg)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 27 May 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 18 June 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 mechanical failure in a specific helicopter model. There is no evidence of scope creep; it targets exactly the unsafe condition described in the background (aft fitting failures) and mandates exactly one corrective action (replacement with steel fittings)."},"complexity_factors":["Very short document (approximately 250 words)","Only 4 defined elements: applicability (specific model/serial numbers), requirement (single service bulletin reference), compliance deadline, and background","No cross-references to other legislation beyond a single note referencing an Italian aviation directive (ENAC AD 2000-128)","Simple conditional logic: only one exception group (four excluded serial numbers)","Single mandatory action with clear deadline","No nested exceptions or layered compliance requirements"],"plain_english_summary":"This mandatory Airworthiness Directive orders owners/operators of Agusta A109E helicopters (serials up to 11069, except 11049, 11055, 11056, 11067) to replace cracked aluminium aft fittings that attach the main transmission support link.  \n\nFittings must be replaced with steel per Agusta Service Bulletin No. 109EP-7 before 31 July 2003. Failure could allow transmission detachment or loss of control, so compliance is critical for flight safety."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD implements the corrective action described in its Background — replacement of aluminium fittings with steel ones — and applies to a specific set of Model 109E serial numbers with listed exclusions. The text shows no expansion or narrowing beyond that stated intent; obligations are limited to following the Agusta service bulletin by the compliance date."},"complexity_factors":["Narrow, serial-numbered applicability with four explicit exclusions increases identification work for operators (Applicability).","Requirement delegates technical detail to an external document — Agusta Service Bulletin No. 109EP-7 — requiring operators/maintenance organisations to obtain and interpret that bulletin (Requirement).","Fixed compliance deadline creates scheduling and operational-disruption constraints (Compliance: before 31 July 2003).","Technical nature of the corrective action (replacement of transmission support fittings) requires qualified maintenance and possible parts procurement.","Statutory basis under CASR subregulation 39.1(1) and cross-reference note to ENAC AD 2000-128 add regulatory context but do not alter the core action."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Agusta A109E helicopters (serial numbers up to and including 11069, excluding 11049, 11055, 11056 and 11067) to replace aluminium aft main-transmission support fittings with improved steel fittings by following Agusta Service Bulletin No. 109EP-7.\n\nCompliance is required before 31 July 2003; the CASA delegate issued the AD under CASR subregulation 39.1(1). Owners/operators pay for the replacement, must schedule the work to meet the deadline, and follow the service bulletin instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a109-44-main-transmission-support-fittings","history":"/api/acts/ad-a109-44-main-transmission-support-fittings/history","analysis":"/api/acts/ad-a109-44-main-transmission-support-fittings/analysis","conflicts":"/api/acts/ad-a109-44-main-transmission-support-fittings/conflicts","importantCases":"/api/acts/ad-a109-44-main-transmission-support-fittings/important-cases","documents":"/api/acts/ad-a109-44-main-transmission-support-fittings/documents"}}