{"id":"F2006B04979","name":"AD/CESSNA 170/51 - Console Reinforcement and Fuel Selector Shaft Roll Pin","slug":"ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44871,"registerId":"commonwealth-F2006B04979-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 170/51 - Console Reinforcement and Fuel Selector Shaft Roll 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)  Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes\n\n \n\n# AD/CESSNA 170/51 Console Reinforcement and\n\nFuel Selector Shaft Roll Pin\n\nApplicability: Model 172 with Serial Number 17276260 to 17276303. Requirement:  Action in accordance with Cessna SB No SEB85-3.\n\nCompliance: Prior to issue of Certificate of Airworthiness.\n\n# 6/85\n\n \n\nBackground: The applicability of this Directive is restricted to 1985 Model 172 Skyhawk series aircraft. Due to manufacturers omissions, it is necessary to install a reinforcement angle to the fuel selector bracket, and ensure that the fuel selector shaft roll pin has been properly secured.\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":1676},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains precisely targeted at its original purpose: correcting a specific manufacturing omission in 1985-model Cessna 172 aircraft. It has not expanded beyond the original fuel selector bracket reinforcement and roll pin securing requirements for the identified serial number range."},"complexity_factors":["Extremely narrow applicability limited to 44 specific aircraft serial numbers","Single, unconditional requirement referencing one external technical standard (Cessna Service Bulletin SEB85-3)","No definitions, interpretation clauses, or nested exceptions","Clear compliance trigger (prior to Certificate of Airworthiness issue)"],"plain_english_summary":"Mandatory safety directive requiring mechanics to fix a fuel-system manufacturing defect on about 44 specific 1985 Cessna 172 Skyhawk aircraft (serials 17276260–17276303). The work—installing a reinforcement angle and properly securing the roll pin per Cessna Service Bulletin SEB85-3—must be completed before issuance of the aircraft’s Certificate of Airworthiness to prevent possible in‑flight fuel failures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin","history":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin/history","analysis":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin/analysis","conflicts":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin/conflicts","importantCases":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin/important-cases","documents":"/api/acts/ad-cessna-170-51-console-reinforcement-and-fuel-selector-shaft-roll-pin/documents"}}