{"id":"F2008L00173","name":"AD/CESSNA 170/31 Amdt 1 - Fuel Vent Tube - CANCELLED","slug":"ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72352,"registerId":"commonwealth-F2008L00173-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 170, 172, F172, FR172 and 175 Ser","sectionType":"division","heading":"Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes","content":"### Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes\n\n| AD/CESSNA 170/31 Amdt 1 | Fuel Vent Tube | 2/2008 |\n| ----------------------- | -------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                             |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 14 February 2008.                                                                                                                                                                                                                                                                              |\n| Background:  | This is a unique Australian AD issued in 1978 to inspect the installation of the fuel vent tube. On certain serial number aircraft, the manufacturer indicated that the fuel vent tube may have been installed incorrectly. As all affected aircraft would have been inspected, the unsafe condition no longer exists. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n20 December 2007","sortOrder":0},{"sectionNumber":"AD/CESSNA 170/31 Amdt 1","sectionType":"part","heading":"AD/CESSNA 170/31 Amdt 1","content":"## AD/CESSNA 170/31 Amdt 1","sortOrder":1},{"sectionNumber":"Fuel Vent Tube","sectionType":"part","heading":"Fuel Vent Tube","content":"## Fuel Vent Tube","sortOrder":2},{"sectionNumber":"2/2008","sectionType":"part","heading":"2/2008","content":"## 2/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1963},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This amendment eliminates all operative requirements of the original 1978 Airworthiness Directive, changing the scope from imposing mandatory inspection obligations on specific aircraft to removing them entirely."},"complexity_factors":["Single operative provision cancelling previous requirements","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislative provisions","Background explanation limited to two sentences"],"plain_english_summary":"This instrument revokes a 1978 mandatory directive that required inspection of the fuel vent tube on certain Cessna 170/172/F172/FR172/175 series aeroplanes, effective 14 February 2008. \n\nIt affects owners and operators of those models by removing the old inspection requirement because the unsafe condition has been eliminated through prior maintenance and no longer exists."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled","history":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled/history","analysis":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled/analysis","conflicts":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled/important-cases","documents":"/api/acts/ad-cessna-170-31-amdt-1-fuel-vent-tube-cancelled/documents"}}