{"id":"F2007L04538","name":"AD/GENERAL/22 - Engine Oil Tank - Modification - CANCELLED","slug":"ad-general-22-engine-oil-tank-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71037,"registerId":"commonwealth-F2007L04538-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aircraft - General","sectionType":"division","heading":"Aircraft - General","content":"### Aircraft - General\n\n| AD/GENERAL/22 | Engine Oil Tank - Modification | 13/2007 |\n| ------------- | ------------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                      |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 December 2007.                                                                                                                       |\n| Background:  | This was initially issued as AD/DC3/22 in 1950. It was later replaced in the 60s as AD/GENERAL/22. The AD is obsolete as it is covered by the design standards. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n29 October 2007","sortOrder":0},{"sectionNumber":"AD/GENERAL/22","sectionType":"part","heading":"AD/GENERAL/22","content":"## AD/GENERAL/22","sortOrder":1},{"sectionNumber":"Engine Oil Tank - Modification","sectionType":"part","heading":"Engine Oil Tank - Modification","content":"## Engine Oil Tank - Modification","sortOrder":2},{"sectionNumber":"13/2007","sectionType":"part","heading":"13/2007","content":"## 13/2007","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2706},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument maintains its narrow purpose of cancelling the obsolete directive. While the original AD evolved significantly over its lifetime (expanding from DC-3 specific application in 1950 to general application in the 1960s), this 2007 cancellation version does not expand or alter the scope further — it simply terminates the requirement."},"complexity_factors":["Single operative provision (cancellation of previous instrument)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Only cross-reference is to historical AD numbers (AD/DC3/22)","Extremely brief substantive content (under 75 words)"],"plain_english_summary":"This AD cancels a long-standing safety order that mandated specific engine oil‑tank modifications (originating with the 1950 DC‑3 rule and later expanded). It removes that retrofit requirement for affected older aircraft and owners/operators, effective 20 December 2007, because contemporary airworthiness standards now address the same safety concern."}},"importantCases":[],"_links":{"self":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled","history":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled/history","analysis":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled/analysis","conflicts":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled/conflicts","importantCases":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled/important-cases","documents":"/api/acts/ad-general-22-engine-oil-tank-modification-cancelled/documents"}}