{"id":"F2008L03383","name":"AD/CESSNA 400/64 - Hydraulic Lines - Inspection - CANCELLED","slug":"ad-cessna-400-64-hydraulic-lines-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120338,"registerId":"commonwealth-F2008L03383-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 400 Series Aeroplanes","sectionType":"division","heading":"Cessna 400 Series Aeroplanes","content":"### Cessna 400 Series Aeroplanes\n\n| AD/CESSNA 400/64 | Hydraulic Lines - Inspection | 10/2008 |\n| ---------------- | ---------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                 |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 25 September 2008.                                                                                                                                                                                                                                                                                 |\n| Background:  | This unique Australian AD, issued in 1979, required inspection of the hydraulic lines located in the left wing leading edge in accordance with Cessna Service Letter ME 78-42. The AD compliance was within 100 hours after 28 February 1979. As all aircraft would have now been inspected, the AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n25 July 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 400/64","sectionType":"part","heading":"AD/CESSNA 400/64","content":"## AD/CESSNA 400/64","sortOrder":1},{"sectionNumber":"Hydraulic Lines - Inspection","sectionType":"part","heading":"Hydraulic Lines - Inspection","content":"## Hydraulic Lines - Inspection","sortOrder":2},{"sectionNumber":"10/2008","sectionType":"part","heading":"10/2008","content":"## 10/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2087},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates a spent requirement rather than expanding it. The scope remains limited to the original cohort of Cessna 400 series aircraft and the specific hydraulic line inspection, but the directive now has no ongoing legal effect as of the cancellation date."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references, exceptions, or conditional logic","Straightforward retrospective rationale based on elapsed compliance period"],"plain_english_summary":"This document cancels an old aircraft maintenance rule that applied to **Cessna 400 series aeroplanes**.\n\n**What the original rule required:**\nIssued in 1979, the directive required owners to inspect hydraulic lines in the left wing leading edge within 100 hours of flying time after 28 February 1979. This was to address safety concerns identified by the manufacturer (Cessna Service Letter ME 78-42).\n\n**What this document does:**\nIt **cancels** the rule effective **25 September 2008**. Because the compliance deadline passed nearly 30 years ago, all affected aircraft have already been inspected. The requirement is no longer needed and has been formally removed from the aviation safety rules.\n\n**Who is affected:**\nOwners and operators of Cessna 400 series aircraft are no longer legally required to comply with this specific inspection (though they would have completed it decades ago)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled","history":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled/history","analysis":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled/analysis","conflicts":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled/important-cases","documents":"/api/acts/ad-cessna-400-64-hydraulic-lines-inspection-cancelled/documents"}}