{"id":"F2008L03084","name":"AD/EC 225/1 - Main Rotor Blades - Heated","slug":"ad-ec-225-1-main-rotor-blades-heated","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75121,"registerId":"commonwealth-F2008L03084-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter EC 225 Series Helicopters","sectionType":"division","heading":"Eurocopter EC 225 Series Helicopters","content":"### Eurocopter EC 225 Series Helicopters\n\n| AD/EC 225/1 | Main Rotor Blades - Heated | 11/2008 DM |\n| ----------- | -------------------------- | ---------- |\n\n| Applicability: | EC 225 LP helicopters, all serial numbers, fitted with main rotor blades P/N332A11-0055-00 fitted with de-icer assemblies with individual serial numbers below 400 and that have not been repaired in accordance with Repair sheet CN 456 orCN 457.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | For Main Rotor Blades installed on helicopters:1. On affected main rotor blades, having logged less than 100 flying hours since they were delivered new or since they were repaired at the factory:Check the two neoprene layers, forming part of the de-icer assembly, for correct cohesion, in accordance with paragraphs 2.B.1, 2.B.2 and 2.B.3 of EurocopterEC 225 LP Alert service bulletin No. 01A002.2. On affected main rotor blades, having logged 100 flying hours or more since they were delivered new or since they were repaired at the factory:Check the two neoprene layers, forming part of the de-icer assembly, for correct cohesion, in accordance with paragraphs 2.B.1, 2.B.2 and 2.B.3 of EurocopterEC 225 LP Alert service bulletin No. 01A002.Results Interpretation- If there is no loss of cohesion over the thickness of the edge strip between the two neoprene layers, forming part of the de-icer, caulk the cut and return the helicopter to its initial condition in compliance with the instructions given in paragraphs 2.B.4 and 2.B.5 of Eurocopter EC 225 LP Alert service bulletin No. 01A002.- If there is a loss of cohesion from one adhesive face, over the thickness of the edge strip between the two neoprene layers, forming part of the de-icer, remove and replace the affected main rotor blade before the next flight.For Main Rotor Blades not installed on helicopters:Before installation on a helicopter, comply with the instructions given in paragraph 2 of Eurocopter EC 225 LP Alert service bulletin No. 01A002. |\n\n|             | Note: DGAC AD F-2008-012 dated 30 July 2008 refers.                                                                                                                                                                                                                                                                                  |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | 1. Before further flight.2. By 30 September 2008.                                                                                                                                                                                                                                                                                    |\n|             | This Airworthiness Directive becomes effective on 15 September 2008.                                                                                                                                                                                                                                                                 |\n| Background: | This Airworthiness Directive is issued following a loss of cohesion between the two neoprene layers, forming part of the leading edge de-icer. This Directive requires a check of the de-icing strip for loss of cohesion which could cause the stainless steel protective strip of the de-icer to detach from the main rotor blade. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 August 2008","sortOrder":0},{"sectionNumber":"AD/EC 225/1","sectionType":"part","heading":"AD/EC 225/1","content":"## AD/EC 225/1","sortOrder":1},{"sectionNumber":"Main Rotor Blades - Heated","sectionType":"part","heading":"Main Rotor Blades - Heated","content":"## Main Rotor Blades - Heated","sortOrder":2},{"sectionNumber":"11/2008 DM","sectionType":"part","heading":"11/2008 DM","content":"## 11/2008 DM","sortOrder":3}],"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":5,"scope_assessment":{"changed":false,"description":"The Directive sets requirements for a defined subset of EC 225 LP helicopters fitted with specific blade and de-icer serials and excludes blades repaired per CN 456/CN 457. The text contains no amendment or extension to that applicability; no change of scope from the stated applicability is indicated in the document."},"complexity_factors":["Precise applicability tied to part number, de-icer serial-number (<400) and exclusion if repaired per Repair sheet CN 456 or CN 457 (Applicability).","Inspection and remedial actions depend on technical criteria in the manufacturer's Alert Service Bulletin (Eurocopter EC 225 LP Alert service bulletin No. 01A002 is normatively referenced in Requirement).","Different operational triggers noted by hours-since-new/repair thresholds (<100 hours and ≥100 hours) though both require the same cohesive check (Requirement).","Multiple compliance timeframes: immediate action clause 'before further flight' and an absolute deadline 'by 30 September 2008' (Compliance), plus an AD effective date (15 September 2008).","Clear go/no-go remedy: caulk and return to service if no loss of cohesion; mandatory removal and replacement before next flight if adhesive separation is found (Requirement — Results Interpretation).","Separate instructions apply to blades not yet installed: must comply with paragraph 2 of the Alert Service Bulletin before installation (Requirement).","Safety-critical judgment (assessing 'loss of cohesion' between neoprene layers) can introduce subjective interpretation during inspections (Results Interpretation).","Reliance on external technical documents and foreign regulator reference (DGAC AD F-2008-012) increases compliance complexity and administrative tracking (Note; Background).","Immediate operational costs concentrated on aircraft operators: inspection labour, potential blade replacement part cost, and aircraft downtime (implied by inspection/removal/replacement requirements)."],"plain_english_summary":"This Airworthiness Directive requires operators of Eurocopter EC 225 LP helicopters fitted with specific heated main rotor blades (P/N 332A11-0055-00 with de-icer serials below 400 and not repaired under CN456/CN457) to inspect the neoprene layers of the de-icer for loss of cohesion and either caulk or replace blades that fail the check. Compliance is immediate (before next flight or by 30 Sept 2008), so operators bear inspection and any replacement costs and must follow Eurocopter Alert Service Bulletin No. 01A002 for procedures."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect in a specific aircraft component. The scope remains tightly focused on the original safety issue — preventing de-icer detachment on affected EC 225 LP helicopter main rotor blades."},"complexity_factors":["Multiple nested conditions for applicability (specific helicopter model, specific part number, specific serial number range, specific repair history exclusions)","Different inspection requirements based on flying hours threshold (100 hours)","Conditional outcomes based on inspection results (two different repair/replace pathways)","Cross-reference to external technical document (Eurocopter Alert Service Bulletin No. 01A002) for detailed procedures","Reference to foreign aviation authority directive (DGAC AD F-2008-012)"],"plain_english_summary":"This AD requires owners/operators of Eurocopter EC225 LP helicopters fitted with main rotor blades P/N 332A11-0055-00 (de‑icer SNs below 400, unless repaired per CN456/CN457) to inspect the neoprene de‑icer layers for bond failure. Delamination can allow a stainless‑steel protective strip to detach from a spinning blade, creating a catastrophic debris hazard. Affected blades must be inspected and sealed, repaired, or replaced before further flight per hours‑based criteria, with full compliance required by 30 September 2008."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ec-225-1-main-rotor-blades-heated","history":"/api/acts/ad-ec-225-1-main-rotor-blades-heated/history","analysis":"/api/acts/ad-ec-225-1-main-rotor-blades-heated/analysis","conflicts":"/api/acts/ad-ec-225-1-main-rotor-blades-heated/conflicts","importantCases":"/api/acts/ad-ec-225-1-main-rotor-blades-heated/important-cases","documents":"/api/acts/ad-ec-225-1-main-rotor-blades-heated/documents"}}