{"id":"F2009L01947","name":"AD/AA-1/4 - Fuel Tank Contents Manometer Vent Lines - Modification - CANCELLED","slug":"ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79096,"registerId":"commonwealth-F2009L01947-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Gulfstream (Grumman American/ American A","sectionType":"division","heading":"Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes","content":"### Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes\n\n| AD/AA-1/4 | Fuel Tank Contents Manometer Vent Lines - Modification | 6/2009 |\n| --------- | ------------------------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                            |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 4 June 2009.                                                                                                                                                                                                                                                  |\n| Background:  | This AD, issued in 1972, required inspection of each fuel tank contents manometer vent line to ensure the vent line is not kinked. The AD compliance was before the issue of a Certificate of Airworthiness. As all aircraft would have been inspected, the AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2009","sortOrder":0},{"sectionNumber":"AD/AA-1/4","sectionType":"part","heading":"AD/AA-1/4","content":"## AD/AA-1/4","sortOrder":1},{"sectionNumber":"Fuel Tank Contents Manometer Vent Lines ","sectionType":"part","heading":"Fuel Tank Contents Manometer Vent Lines - Modification","content":"## Fuel Tank Contents Manometer Vent Lines - Modification","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1675},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the previous Airworthiness Directive in its entirety. It does not expand the scope but rather removes all previous regulatory requirements, as the safety issue has been addressed for all affected aircraft through historical compliance."},"complexity_factors":["Single operative provision (cancellation) with no substantive compliance requirements","No defined terms, interpretation section, or cross-references to other legislation","Document consists solely of cancellation statement and brief historical background"],"plain_english_summary":"This document officially cancels a 1972 aviation safety rule that applied to Gulfstream AA-1 series aeroplanes. The old rule required inspection of fuel tank **manometer vent lines** (tubes that measure fuel levels and allow air to escape) to ensure they weren't **kinked** (bent or blocked). This inspection had to be completed before an aircraft could receive its **Certificate of Airworthiness** (the official document proving a plane is safe to fly). Because every affected aircraft would have undergone this inspection by now when they were first certified, the rule is no longer necessary. As of 4 June 2009, aircraft owners and operators no longer need to comply with this specific requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled","history":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled/history","analysis":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled/analysis","conflicts":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled/conflicts","importantCases":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled/important-cases","documents":"/api/acts/ad-aa-1-4-fuel-tank-contents-manometer-vent-lines-modification-cancelled/documents"}}