{"id":"F2006B02489","name":"AD/AS 355/35 - AC Generation System","slug":"ad-as-355-35-ac-generation-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41745,"registerId":"commonwealth-F2006B02489-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/35 - AC Generation System","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nEurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\nAD/AS 355/35 AC Generation System 7/90 TX\n\nApplicability: All Aerospatiale AS 355E, F, F1, F2 and N series helicopters equipped with dual AC generation systems delivered before 5 April 1990.\n\nRequirement: Ensure correct operation of the AC power system in accordance with work card No 24.22.04.501 (updated 83.31).\n\nNote: Aerospatiale Service Telex 01.29 refers.\n\nCompliance: 1. Prior to the next flight scheduled under IFR conditions, or\n\n    2. For aircraft operated under VFR conditions, prior to 100 hours time in service after 2 May 1990.\n\n    3. If a printed circuit board 3 x 1 or 3 x 2 is to be fitted as a replacement part and does not bear the inspection stamp: SS 235, prior to fitment.\n\nBackground: Aerospatiale has advised that due to a diode mounting fault on printed circuit boards 3 x 1 and 3 x 2, the potential exists for a total loss of AC power.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2107},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope as a targeted safety fix for a specific manufacturing defect in identified helicopter models. No expansion beyond the original electrical system safety requirement is evident."},"complexity_factors":["Conditional compliance deadlines based on operational flight rules (IFR vs VFR)","Technical aviation terminology and precise part identification (printed circuit boards 3 x 1, 3 x 2)","External cross-references to maintenance work cards and service telex numbers","Specific quality control requirements for replacement components (inspection stamp SS 235)"],"plain_english_summary":"This Airworthiness Directive targets Eurocopter AS 355E/F/F1/F2/N helicopters delivered before 5 April 1990 with dual AC generators. It addresses misassembled diodes on specific circuit boards that can cause total AC electrical failure in flight. Operators/owners must verify the AC power system per Work Card No. 24.22.04.501; IFR operations require the check before the next flight, VFR operations within 100 flight hours after 2 May 1990. Replaced boards must carry the inspection stamp “SS 235.”"}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-35-ac-generation-system","history":"/api/acts/ad-as-355-35-ac-generation-system/history","analysis":"/api/acts/ad-as-355-35-ac-generation-system/analysis","conflicts":"/api/acts/ad-as-355-35-ac-generation-system/conflicts","importantCases":"/api/acts/ad-as-355-35-ac-generation-system/important-cases","documents":"/api/acts/ad-as-355-35-ac-generation-system/documents"}}