{"id":"F2006B04293","name":"AD/BEECH 95/21 - Fuselage Bulkheads FS 257.6 & FS 271.92","slug":"ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44104,"registerId":"commonwealth-F2006B04293-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 95/21 - Fuselage Bulkheads FS 257.6 & FS 271.92","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 95 (Travelair) Series Aeroplanes\n\n \n\nAD/BEECH 95/21 Fuselage Bulkheads FS 257.6 & FS 271.92 4/79\n\nApplicability: All models 95, B95, B95A, D95A and E95 with S/Nos TD-2 to TD-721. Requirement:               Action in accordance with Beechcraft SI No 0990.\n\nCompliance: Initially inspect within 100 hours’ time in service after 30 April 1979 and thereafter at intervals not exceeding 500 hours’ time in service or 1 year, whichever occurs first.\n\n \n\nBackground: Cracks may develop in the subject bulkheads in the areas of the horizontal stabilator attachments.\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":1595},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope targeting specific structural inspections on defined Beechcraft 95 series aircraft models; no evidence of scope creep beyond the original safety intent."},"complexity_factors":["Single, discrete mandate with clear applicability (specific aircraft models and serial numbers)","Reference to external technical document (Beechcraft SI No 0990) without reproducing its contents","Technical terminology requiring aviation engineering knowledge (fuselage bulkheads, FS stations, stabilator)","Dual-track compliance calculation (flight hours versus calendar time)"],"plain_english_summary":"**What this does:** This is a mandatory safety rule for owners and operators of specific Beechcraft twin-engine aircraft (models 95, B95, B95A, D95A, and E95 with serial numbers TD-2 to TD-721).\n\n**What it requires:** You must inspect two specific structural frames inside the aircraft body (called bulkheads, located at positions FS 257.6 and FS 271.92) for cracks. These frames support the connection points for the horizontal tail surfaces (the stabilator).\n\n**When to inspect:**\n- **First check:** Within 100 hours of flying time after 30 April 1979\n- **Repeat checks:** Every 500 flying hours or every 12 months, whichever happens first\n\n**Why it matters:** Cracks can develop in these bulkheads around the tail attachment points due to stress. If left unchecked, this could compromise the aircraft's structure and affect flight safety.\n\n**How to comply:** Follow the inspection procedures outlined in Beechcraft Service Instruction No 0990."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92","history":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92/history","analysis":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92/analysis","conflicts":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92/conflicts","importantCases":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92/important-cases","documents":"/api/acts/ad-beech-95-21-fuselage-bulkheads-fs-257-6-fs-271-92/documents"}}