{"id":"F2006B01820","name":"AD/A109/34 - Windshield Wipers","slug":"ad-a109-34-windshield-wipers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41018,"registerId":"commonwealth-F2006B01820-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\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 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\n![](image.001.png)\n\nAgusta A109 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/A109/34 Windshield Wipers 4/2003","sectionType":"part","heading":"AD/A109/34 Windshield Wipers 4/2003","content":"# AD/A109/34 Windshield Wipers 4/2003\n\nApplicability: All A 109E helicopters listed in Agusta Alert Bollettino Tecnico (BT) 109EP-27 Revision A dated 7 February 2003.\n\nRequirement: 1. A 109E \"PW206C\" helicopters serial number (S/N) 11122 to S/N 11130 inclusive (except for S/Ns 11123, 11127 and 11129) and A 109E \"TM2k1\" helicopters S/N 11502 to S/N 11504 inclusive \\- Deactivate the windshield wiper system and install a placard in clear view of the pilot stating ‘WINDSHIELD WIPERS INOPERATIVE’ in accordance with Part I of Alert BT 109EP-27 Revision A.\n\n    2. A 109E \"PW206C\" helicopters S/N 11122 to S/N 11130 inclusive (except for S/Ns 11123, 11127 and 11129) and A 109E \"TM2k1\" helicopters S/N 11502 to S/N 11504 inclusive \\- Modify the windshield wiper electrical system in accordance with Part II of Alert BT 109EP-27 Revision A.\n\n    3. A 109E \"PW206C\" helicopters S/N 11001 to S/N 11133 inclusive, with windshield wiper kit part number (P/N) 109-0811-44-101/-102 or P/N 109- 0811-44-105/-106 installed (except for S/Ns 11122, 11124, 11125, 11126, 11127, 11128 and 11130), A 109 Elite \"PW 206C\" helicopter S/N 11151 and A 109 \"M2k1\" helicopter S/N 11501 \\- Modify the windshield wiper electrical system in accordance with Part III of Alert BT 109EP-27 Revision A.\n\nNote: ENAC AD 2003-032 refers.\n\nCompliance: For Requirement 1 \\- Within five hours time in service (TIS) after the effective date of this Directive.\n\nFor Requirement 2 \\- Before 1 June 2003.\n\nFor Requirement 3 \\- Concurrent with the first replacement of timed relay P/N T412- DJ1001-C with new relay P/N TDH-8070-1001P or P/N T412-2006.\n\nThis Airworthiness Directive becomes effective on 17 April 2003.\n\nBackground: The Italian Ente Nazionale per l’Aviation Civile (ENAC) has received advice of a resistor overheating in the windshield wiper system. This overheating could result in smoke or fire in the helicopter.","sortOrder":1}],"analysis":{"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":4,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with its stated safety objective. It targets specific A109E serial numbers and windshield‑wiper components to mitigate resistor overheating and associated smoke/fire risk, and confines required actions to deactivation, placarding, electrical modification, or relay replacement as prescribed in the referenced Alert BT."},"complexity_factors":["Narrow, serial‑numbered applicability across overlapping model variants and multiple exceptions (Requirement 1–3 applicability lists)","Staged compliance deadlines: immediate (5 hours TIS), a fixed calendar date (before 1 June 2003), and a deferred trigger tied to first replacement of a specific relay (Compliance section)","Dependence on an external technical document for instructions (Agusta Alert BT 109EP‑27 Revision A referenced in each Requirement)","Multiple technical paths: deactivate/placard, electrical system modification, or modification tied to specific wiper kit part numbers and relay part‑number replacement (Requirements 1–3)","Explicit part numbers and serial number exceptions increase record‑checking and parts‑management burden for operators"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain Agusta A109E helicopters to deactivate windshield wipers, post a cockpit placard, and perform specified electrical modifications or relay replacements per Agusta Alert Bollettino Tecnico BT 109EP‑27 Revision A. The directive responds to reported resistor overheating that could cause smoke or fire. Affected operators and maintenance providers must carry out the listed actions within urgent timelines (five hours for immediate deactivation; other modifications by set dates or at relay replacement), and bear the cost and downtime for parts and labour."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in a defined aircraft population. The scope remains precisely limited to the windshield wiper electrical system fire risk as originally identified."},"complexity_factors":["Multiple overlapping applicability groups with serial number ranges and specific exclusions (e.g., 'S/N 11122 to S/N 11130 inclusive (except for S/Ns 11123, 11127 and 11129)')","Three distinct requirements applying to partially overlapping but distinct aircraft subsets","Cross-reference to external technical document (Agusta Alert Bollettino Tecnico 109EP-27 Revision A) which contains the actual implementation instructions","Three different compliance timeframes with different triggering mechanisms (hours in service, calendar date, and maintenance event)","Reference to foreign aviation authority directive (ENAC AD 2003-032) for additional context"],"plain_english_summary":"This safety order for specified Agusta A109E helicopters requires operators to address an overheated windshield-wiper resistor fire risk. It mandates three remedies — immediate deactivation and placard within five flight hours, a short-term electrical modification by 1 June 2003, and a long-term modification at the next relay replacement. It affects owners/operators of listed serial-numbered A109E aircraft (certain PW206C/TM2k1 engines) and is legally binding to prevent cockpit smoke or fire."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a109-34-windshield-wipers","history":"/api/acts/ad-a109-34-windshield-wipers/history","analysis":"/api/acts/ad-a109-34-windshield-wipers/analysis","conflicts":"/api/acts/ad-a109-34-windshield-wipers/conflicts","importantCases":"/api/acts/ad-a109-34-windshield-wipers/important-cases","documents":"/api/acts/ad-a109-34-windshield-wipers/documents"}}