{"id":"F2006B06698","name":"AD/S-76/14 - Fuselage Bulkhead - Engine Support Fitting Area - Inspection and Modification","slug":"ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114504,"registerId":"commonwealth-F2006B06698-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-76/14 - Fuselage Bulkhead - Engine Support Fitting Area - Inspection and Modification","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)  Sikorsky S-76 Series Helicopters\n\n \n\n# AD/S-76/14 Fuselage Bulkhead - Engine Support\n\nFitting Area - Inspection and Modification Applicability: All models S-76 with S/Nos. 76003, 76005, and 76006; 760001 to 760024. Document:               Sikorsky CSB No. 76-53-5A.\n\nCompliance: As per requirement document.\n\n# 10/80\n\n \n\nBackground: The manufacturer has received reports of cracks being found in the engine support bulkhead at STA.255.\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\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":804},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This appears to be the original scope of the Airworthiness Directive - a targeted safety requirement addressing a specific structural defect in specific aircraft. There is no indication the directive has expanded beyond its original purpose of addressing the cracked engine support bulkhead issue."},"complexity_factors":["Very short document (less than one page)","Minimal defined terms","References external technical document for actual compliance details rather than spelling them out","Simple conditional logic (applies only to specific serial numbers)","No nested exceptions or cross-references to other legislation"],"plain_english_summary":"**What this is:** A mandatory safety directive (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) requiring specific helicopters to be inspected and repaired.\n\n**Who it affects:** Owners and operators of Sikorsky S-76 helicopters with specific serial numbers: 76003, 76005, 76006, and any from 760001 to 760024.\n\n**What it requires:**\n* **Inspection:** Check the fuselage bulkhead (a structural wall) in the area where the engine is mounted\n* **Modification:** Carry out any necessary repairs or modifications to fix cracks found in this area\n* **How to comply:** Follow the detailed instructions in Sikorsky Service Bulletin No. 76-53-5A\n\n**Why it matters:** The manufacturer discovered cracks in the engine support bulkhead at a specific location (called STA.255). This structural failure could compromise the safety of the aircraft, so CASA is mandating checks to ensure these cracks are found and fixed before they cause serious problems."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification","history":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification/history","analysis":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification/analysis","conflicts":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification/important-cases","documents":"/api/acts/ad-s-76-14-fuselage-bulkhead-engine-support-fitting-area-inspection-and-modification/documents"}}