{"id":"F2006B06731","name":"AD/S-76/55 Amdt 1 - Retention Bolt for Stationary Swashplate Expandable Pin","slug":"ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114558,"registerId":"commonwealth-F2006B06731-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-76/55 Amdt 1 - Retention Bolt for Stationary Swashplate Expandable Pin","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\nAD/S-76/55\n\nAmdt 1\n\n\nRetention Bolt for Stationary Swashplate Expandable Pin\n\n\n5/90\n\n \n\nApplicability: All model S-76A and S-76B series prior to and including SS No 760356 and 760367. Requirement:               Action in accordance with Sikorsky Alert Service Bulletin No 76-67-38.\n\nCompliance: Before issue of an Australian C of A.\n\n \n\nBackground: The manufacturer now requires the installation of a nut and bolt assembly in the stationary swashplate. This will ensure the expandable pin assembly does not migrate from its location.\n\n \n\nAmendment 1 adds aircraft S/N and changes the compliance Requirement.\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":2144},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 expanded the applicability to include additional aircraft serial numbers (specifically adding S/N 760367 alongside 760356) and modified the compliance requirements from the original directive."},"complexity_factors":["Contains only one abbreviation requiring definition (C of A meaning Certificate of Airworthiness)","References external technical document (Sikorsky Alert Service Bulletin No 76-67-38) without reproducing its content","Applicability determined by specific aircraft serial number ranges only","Single mechanical compliance action with no exceptions, conditions, or nested logic"],"plain_english_summary":"This directive mandates a safety fix for specific Sikorsky S-76 helicopters to prevent a critical flight control component from coming loose.\n\n**Who it affects:** Owners and operators of S-76A and S-76B helicopters with serial numbers up to and including 760356 and 760367.\n\n**What you must do:** Install a nut and bolt assembly in the stationary swashplate (a rotating part that helps control the helicopter's blades) according to the manufacturer's Alert Service Bulletin No 76-67-38. This prevents the expandable pin from slipping out of position, which could affect flight safety.\n\n**When:** Before the aircraft can be issued with an Australian Certificate of Airworthiness (C of A) — the legal document proving an aircraft is safe to fly.\n\n**What's new:** This update expands the list of affected aircraft by adding more serial numbers and changes when the work must be completed compared to the original version."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin","history":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin/history","analysis":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin/analysis","conflicts":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin/conflicts","importantCases":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin/important-cases","documents":"/api/acts/ad-s-76-55-amdt-1-retention-bolt-for-stationary-swashplate-expandable-pin/documents"}}