{"id":"F2006B04963","name":"AD/CESSNA 170/31 Amdt 1 - Fuel Vent Tube","slug":"ad-cessna-170-31-amdt-1-fuel-vent-tube","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44838,"registerId":"commonwealth-F2006B04963-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 170/31 Amdt 1 - Fuel Vent Tube","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\nAD/CESSNA 170/31\n\nAmdt 1\n\n\nFuel Vent Tube 9/78\n\n \n\nApplicability: Models 172 and 172XP with S/Nos 17267585 to 17270223 and R1722000 to R1722852.\n\n \n\nRequirement: Action in accordance with Cessna SL No SE78-40, Supplement No 1. Compliance:  Within 100 hours time in service after 30 September 1978.\n\nNote: Compliance with the preceding issue of this Directive does not satisfy compliance with this issue of the Directive. Dimensions printed in SL No 78-40 were incorrect.\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":953},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment corrects technical specifications (dimensions) in the referenced manufacturer service letter but does not expand the scope beyond the original fuel vent tube safety issue for the same aircraft models."},"complexity_factors":["Single technical requirement referencing an external manufacturer document","Narrow applicability limited to specific aircraft serial number ranges","No defined terms, cross-references to other legislation, or conditional exceptions","Straightforward compliance deadline (100 hours time in service)"],"plain_english_summary":"**What this does:** This directive mandates a safety fix for the fuel vent tube on specific Cessna 172 aircraft models.\n\n**Who it affects:** Owners and operators of Cessna 172 and 172XP aircraft with serial numbers between 17267585–17270223 and R1722000–R1722852.\n\n**What must be done:**\n- Follow the instructions in **Cessna Service Letter No. SE78-40, Supplement No. 1** (a technical bulletin from the manufacturer)\n- Complete the work within **100 hours of flight time** after 30 September 1978\n\n**Important warning:** If you already complied with the previous version of this directive, you **must do it again**. The earlier manufacturer instructions contained incorrect dimensions, so the previous fix may not be safe."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube","history":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube/history","analysis":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube/analysis","conflicts":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube/conflicts","importantCases":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube/important-cases","documents":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube/documents"}}