{"id":"F2006B02488","name":"AD/AS 355/34 Amdt 1 - Rotating Swashplate Bearing","slug":"ad-as-355-34-amdt-1-rotating-swashplate-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41744,"registerId":"commonwealth-F2006B02488-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/34 Amdt 1 - Rotating Swashplate Bearing","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 355/34\n\nAmdt 1\n\n  \n\nRotating Swashplate Bearing 4/90 DM\n\nApplicability: All AS 355 series helicopters.\n\nRequirement: 1. Inspect swashplate in accordance with Paragraph 1C(a) to 1C(f) of Aerospatiale SB 62-16.\n\n    2. Grease the swashplate bearing in accordance with Paragraph 1C(i) of Aerospatiale SB 62-16.\n\n    3. Incorporate the requirements of Aerospatiale SB 62-07 Revision 1.\n\n    4. Visually inspect the swashplate in accordance with Paragraph 1C(g) of Aerospatiale SB 62-16.\n\nCompliance: 1. Unless already accomplished, within 10 hours time in service after 16 February 1990 or by 9 March 1990, whichever occurs first.\n\n    2. At intervals not exceeding 100 hours time in service.\n\n    3. At next “T” type inspection after 31 March 1990 or by 31 December 1990, whichever occurs first.\n\n    4. Immediately after last flight of each day. This inspection may be carried out by pilot in command in which case the precise AD reference shall be entered in a certification made on the Maintenance Release together with any defects found during the inspection.\n\nBackground: The manufacturer has advised that due to seizure of the swashplate bearing a helicopter accident has occurred. This Amendment revises the inspection procedures to improve the possibility of detection of an imminent bearing failure.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1959},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. While it revises inspection procedures to improve detection of imminent bearing failures, it remains strictly focused on the original safety issue (preventing swashplate bearing seizure) and does not expand to cover new aircraft systems, components, or operational requirements beyond the AS 355 series."},"complexity_factors":["References external technical documents (Aerospatiale Service Bulletins 62-16 and 62-07) without reproducing their detailed procedural content","Multiple alternative compliance deadlines using 'whichever occurs first' logic (e.g., '10 hours time in service after 16 February 1990 or by 9 March 1990')","Technical aviation terminology requiring specialized knowledge (e.g., 'swashplate', 'time in service', 'T type inspection', 'Maintenance Release')","Four distinct requirements each with different compliance intervals and responsible parties"],"plain_english_summary":"This mandatory Airworthiness Directive for Eurocopter AS355 Twin Ecureuil helicopters orders operators and pilots to inspect, regularly grease, and install a manufacturer modification on the rotating swashplate bearing, plus perform daily visual checks, after a seizure-related crash. It targets anyone operating or maintaining these helicopters because a seized swashplate bearing can lead to loss of control, so the measures are required to prevent further accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing","history":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing/history","analysis":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing/analysis","conflicts":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing/conflicts","importantCases":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing/important-cases","documents":"/api/acts/ad-as-355-34-amdt-1-rotating-swashplate-bearing/documents"}}