{"id":"F2006B06970","name":"AD/SF340/41 - Elevator and Aileron Coves","slug":"ad-sf340-41-elevator-and-aileron-coves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114883,"registerId":"commonwealth-F2006B06970-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/41 - Elevator and Aileron Coves","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)  \nSAAB SF340 Series Aeroplanes\n\nAD/SF340/41 Elevator and Aileron Coves 2/94\n\nApplicability: Model SF340A with serial numbers 004 through 159 Model 340B with serial numbers 160 through 260.\n\nRequirement: Action in accordance with SAAB Service Bulletin 340-51-012.\n\nNote: LFV AD 1-060 refers.\n\nCompliance: As specified in the Requirement Document with the initial detailed inspection to be performed within 500 hours time in service after 3 February 1994.\n\nBackground: A report was received of the elevators of an aircraft requiring more control force than normal. An investigation revealed that water ingress had occurred between the composite structure and the aluminium foil of the cove, and contact was made between the foil and the elevator when the water froze. This condition may ultimately lead to jamming of the control surface.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2039},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original targeted scope addressing the specific safety hazard of control surface jamming due to water ingress in defined SAAB aircraft models. It has not expanded beyond the original technical safety issue identified in the Background section."},"complexity_factors":["References external technical document (SAAB Service Bulletin 340-51-012) without reproducing its contents","Narrow applicability limited to specific aircraft serial numbers","Technical terminology requires aviation engineering knowledge (e.g., 'elevator coves', 'composite structure', 'time in service')","Time-based compliance measured in flight hours rather than calendar dates"],"plain_english_summary":"This mandatory CASA Airworthiness Directive applies to SAAB SF340A (s/n 004–159) and SF340B (s/n 160–260). It addresses water ingress into the coves around elevator and aileron control surfaces that can freeze between composites and foil lining and jam the controls.\n\nOperators must carry out inspections and corrective actions per SAAB Service Bulletin 340-51-012, with the initial detailed inspection within 500 flight hours after 3 Feb 1994, to prevent loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-41-elevator-and-aileron-coves","history":"/api/acts/ad-sf340-41-elevator-and-aileron-coves/history","analysis":"/api/acts/ad-sf340-41-elevator-and-aileron-coves/analysis","conflicts":"/api/acts/ad-sf340-41-elevator-and-aileron-coves/conflicts","importantCases":"/api/acts/ad-sf340-41-elevator-and-aileron-coves/important-cases","documents":"/api/acts/ad-sf340-41-elevator-and-aileron-coves/documents"}}