{"id":"F2006B04111","name":"AD/BEECH 60/7 - Alternate Air Ducts","slug":"ad-beech-60-7-alternate-air-ducts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43799,"registerId":"commonwealth-F2006B04111-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 60/7 - Alternate Air Ducts","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 60 (Duke) Series Aeroplanes\n\n \n\nAD/BEECH 60/7 Alternate Air Ducts 8/70\n\nApplicability: Model 60 with S/Nos. P-2 to P-48.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0327-258. Compliance:  Within 100 hours’ time in service after 31 August 1970.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1743},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope: a single maintenance action targeting specific Beechcraft 60 aircraft serial numbers regarding alternate air duct integrity. No expansion beyond the original safety intent is evident."},"complexity_factors":["Single discrete requirement referencing external manufacturer documentation (Beechcraft SI No. 0327-258)","Narrow applicability limited to specific serial number range (P-2 to P-48)","Simple conditional compliance timeframe (100 hours after fixed date)"],"plain_english_summary":"**What this does**\nThis is a safety directive (Airworthiness Directive) requiring owners of specific Beechcraft aircraft to perform maintenance on the **alternate air ducts** — a backup airflow system for the engine.\n\n**Who it affects**\nOwners and operators of **Beechcraft Model 60 (Duke)** aeroplanes with serial numbers **P-2 through P-48**.\n\n**The requirement**\nYou must complete the maintenance actions specified in **Beechcraft Service Instruction No. 0327-258** regarding the alternate air ducts. This work must be finished within **100 hours of flight time** after 31 August 1970.\n\n**Why this matters**\nProper functioning of alternate air ducts is critical for engine safety, particularly if the main air intake becomes blocked or iced over. This directive ensures the backup system operates correctly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-60-7-alternate-air-ducts","history":"/api/acts/ad-beech-60-7-alternate-air-ducts/history","analysis":"/api/acts/ad-beech-60-7-alternate-air-ducts/analysis","conflicts":"/api/acts/ad-beech-60-7-alternate-air-ducts/conflicts","importantCases":"/api/acts/ad-beech-60-7-alternate-air-ducts/important-cases","documents":"/api/acts/ad-beech-60-7-alternate-air-ducts/documents"}}