{"id":"F2006B03958","name":"AD/BEECH 50/4 - Rivets in Firewall Seal Plates","slug":"ad-beech-50-4-rivets-in-firewall-seal-plates","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43567,"registerId":"commonwealth-F2006B03958-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 50/4 - Rivets in Firewall Seal Plates","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 50 (Twin Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 50/4 Rivets in Firewall Seal Plates NK\n\nApplicability: Model B50 with S/Nos. CH-1 to CH-98. Requirement:  Action in accordance with Beechcraft SB B50 - No. 7. Compliance:               Forthwith.\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":1869},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This remains a narrow, targeted safety directive addressing a specific technical defect in identified aircraft. The scope is limited to the specified Beechcraft models and does not extend beyond the original fire-safety purpose."},"complexity_factors":["Extremely short text (under 100 words)","Single, specific aircraft model and serial number range","Only one action required (compliance with external service bulletin)","No definitions section, exceptions, or conditional logic","Immediate compliance with no phased implementation"],"plain_english_summary":"**What it does:** This is an immediate safety order requiring owners of specific Beechcraft aircraft to fix a problem with rivets in the firewall seal plates (the metal barriers that prevent engine fires from reaching the cabin).\n\n**Who it affects:** Anyone operating a Beechcraft Model B50 (Twin Bonanza) with serial numbers between CH-1 and CH-98.\n\n**What you must do:** Follow the instructions in Beechcraft Service Bulletin B50-No. 7 to inspect or repair the rivets in the firewall seal plates.\n\n**When:** Immediately (the legal term used is \"forthwith\").\n\n**Why it matters:** Faulty rivets in firewall seals could compromise the aircraft's fire protection, putting passengers and crew at risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates","history":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates/history","analysis":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates/analysis","conflicts":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates/conflicts","importantCases":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates/important-cases","documents":"/api/acts/ad-beech-50-4-rivets-in-firewall-seal-plates/documents"}}