{"id":"F2006B05021","name":"AD/CESSNA 177/27 - Flying Control System Turnbuckles","slug":"ad-cessna-177-27-flying-control-system-turnbuckles","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44931,"registerId":"commonwealth-F2006B05021-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 177/27 - Flying Control System Turnbuckles","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)  Cessna 177 Series Aeroplanes\n\n \n\nAD/CESSNA 177/27 Flying Control System Turnbuckles 4/80\n\nApplicability: All models 177, F177RG & 177RG with S/Nos. 17702615 to 17702752, F177RG00165 to F177RG00177, 177RG01114 to 177RG01366.\n\n \n\nRequirement: Action in accordance with Cessna SIL No. SE 80-16. Compliance:  Within 100 hours time in service after 30 April 1980.\n\nBackground: Some of the AN 155 brass turnbuckles used in the control system may have longitudinal cracks radiating from the turnbuckle end.\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":2829},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope targeting a specific manufacturing defect (cracked brass turnbuckles) in specific Cessna aircraft serial numbers. It has not expanded beyond the original safety issue."},"complexity_factors":["Mandatory compliance with external technical document (Cessna SIL No. SE 80-16) not reproduced within the directive","Use of specialized aviation terminology (AN 155 turnbuckles, time in service, serial number ranges)","Narrow applicability limited to specific manufacturing serial numbers requiring cross-referencing"],"plain_english_summary":"A mandatory FAA Airworthiness Directive requires owners/operators of certain late‑1970s Cessna 177, F177RG, and 177RG aircraft to inspect brass AN‑155 turnbuckles for longitudinal cracks and, if needed, repair or replace them per Cessna Service Information Letter SE 80‑16. The inspection had to be completed within 100 flight hours after April 30, 1980. It prevents in‑flight turnbuckle failure that could lead to loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles","history":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles/history","analysis":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles/analysis","conflicts":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles/conflicts","importantCases":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles/important-cases","documents":"/api/acts/ad-cessna-177-27-flying-control-system-turnbuckles/documents"}}