{"id":"F2006L04015","name":"AD/ECUREUIL/123 - Rotor Flight Controls - Load Compensator Lever","slug":"ad-ecureuil-123-rotor-flight-controls-load-compensator-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60958,"registerId":"commonwealth-F2006L04015-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 350 (Ecureuil) Series Heli","sectionType":"division","heading":"Eurocopter AS 350 (Ecureuil) Series Helicopters","content":"### Eurocopter AS 350 (Ecureuil) Series Helicopters\n\n| AD/ECUREUIL/123 | Rotor Flight Controls - LoadCompensator Lever | 2/2007 TX |\n| --------------- | --------------------------------------------- | --------- |\n\n| Applicability: | EUROCOPTER AS 350 B1 and B2 helicopters.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the aircraft records to determine the part number (P/N) of the load compensator lever.a. If the load compensator lever has never been replaced, or if the load compensator lever was replaced with P/N 355A27-0072-00, resume flights.b. If the installed lever P/N is 355A27-0082-00, contact the manufacturer for further instructions.2. If it cannot be determined whether the load compensator lever has been replaced, or if P/N of the load compensator lever cannot be determined, inspect the aircraft to determine the P/N of load compensator lever using the instructions in paragraph 2.B. of Eurocopter AS 350 Alert Service Bulletin (ASB) No. 67.00.39. Revision 0 dated 28 November 2006 or later EASA approved revisions.a. If the installed lever P/N is 355A27-0072-00, resume flights.b. If the installed lever P/N is 355A27-0082-00, contact the manufacturer for further instructions.3. Do not install yaw control load compensator lever P/N 355A27-0082-00 on any AS 350 B1 or AS 350 B2 aircraft.Note: EASA Emergency AD 2006-0363-E dated 1 December 2006 refers. |\n| Compliance:    | 1. Before further flight.2. Within the next 10 hours time in service after the effective date of this AD.3. From the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 8 December 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n\n| Background: | An investigation conducted by EUROCOPTER has revealed that the load compensator lever referenced in the Illustrated Parts Catalogue is part number (P/N) 355A27-0082-00 instead of P/N 355A27-0072-00. The only yaw control compensator lever authorized for installation on AS350 B1 and AS350 B2 helicopters is P/N 355A27-0072-00. Consequently, this AD requires a check to establish that the part numbers of the load compensator levers installed are compatible with the helicopter version concerned.Yaw control travel restriction can lead to the loss of control of the helicopter. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n7 December 2006","sortOrder":0},{"sectionNumber":"AD/ECUREUIL/123","sectionType":"part","heading":"AD/ECUREUIL/123","content":"## AD/ECUREUIL/123","sortOrder":1},{"sectionNumber":"Rotor Flight Controls - LoadCompensator ","sectionType":"part","heading":"Rotor Flight Controls - LoadCompensator Lever","content":"## Rotor Flight Controls - Load  \nCompensator Lever","sortOrder":2},{"sectionNumber":"2/2007 TX","sectionType":"part","heading":"2/2007 TX","content":"## 2/2007 TX","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD enforces the originally authorised equipment configuration by ensuring only `P/N 355A27-0072-00` is fitted and prohibiting `P/N 355A27-0082-00`. It does not broaden model applicability or add new operational requirements beyond inspection, prohibition of the incorrect part, and following manufacturer instructions (Background; Requirements 1–3)."},"complexity_factors":["Narrow technical focus: only one component (load compensator lever) and two specific part numbers are implicated (Requirements 1–3; Background).","Dual compliance pathway: check maintenance records or perform a physical inspection if records are inconclusive (Requirement 1–2).","Time pressure: actions required before next flight or within 10 flight hours, creating operational scheduling impact (Compliance).","Manufacturer involvement: if the incorrect part (`P/N 355A27-0082-00`) is fitted operators must contact the manufacturer for instructions, adding procedural dependency (Requirement 1–2).","Reference to external service bulletin: inspection procedure relies on Eurocopter ASB No. 67.00.39 for inspection instructions, creating reliance on another document (Requirement 2).","Limited applicability: only affects AS350 B1 and B2 variants, reducing administrative spread but concentrating actions on affected operators (Applicability)."],"plain_english_summary":"This Airworthiness Directive requires operators of Eurocopter AS350 B1 and B2 helicopters to check records or inspect the aircraft to confirm the yaw load‑compensator lever part number, to prohibit fitting `P/N 355A27-0082-00`, and to follow manufacturer instructions if that part is found (Requirements 1–3). Compliance is immediate—before further flight or within 10 flight hours—and operators bear the inspection and any corrective costs (Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific parts catalogue error for two specific helicopter models. The directive has not expanded beyond its initial safety purpose of ensuring correct load compensator lever installation."},"complexity_factors":["Short, single-purpose directive with clear sequential steps","Only 2 part numbers to distinguish between (P/N 355A27-0072-00 vs P/N 355A27-0082-00)","Simple conditional logic (if/then branches) with only 2 outcomes per check","Single cross-reference to Eurocopter Alert Service Bulletin No. 67.00.39","No defined terms section — part numbers and helicopter models are used plainly","Three distinct compliance deadlines but all straightforward (immediate, 10 hours, and ongoing prohibition)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive orders owners/operators of Eurocopter AS350 B1/B2 helicopters to verify the rotor flight‑control load compensator lever because an incorrect part number was listed in the parts catalogue. The wrong lever (P/N 355A27‑0082‑00) can restrict yaw control and risk loss of control.\n\nIt’s an emergency safety action affecting operators and maintenance personnel — check records or inspect promptly and do not install the wrong part."},"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-ecureuil-123-rotor-flight-controls-load-compensator-lever","history":"/api/acts/ad-ecureuil-123-rotor-flight-controls-load-compensator-lever/history","analysis":"/api/acts/ad-ecureuil-123-rotor-flight-controls-load-compensator-lever/analysis","conflicts":"/api/acts/ad-ecureuil-123-rotor-flight-controls-load-compensator-lever/conflicts","importantCases":"/api/acts/ad-ecureuil-123-rotor-flight-controls-load-compensator-lever/important-cases","documents":"/api/acts/ad-ecureuil-123-rotor-flight-controls-load-compensator-lever/documents"}}