{"id":"F2008L00806","name":"AD/CESSNA 310/3 - Oxygen Line - Modification - CANCELLED","slug":"ad-cessna-310-3-oxygen-line-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72896,"registerId":"commonwealth-F2008L00806-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 310 Series Aeroplanes","sectionType":"division","heading":"Cessna 310 Series Aeroplanes","content":"### Cessna 310 Series Aeroplanes\n\n| AD/CESSNA 310/3 | Oxygen Line - Modification | 4/2008 |\n| --------------- | -------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                     |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 10 April 2008.                                                                                                                                                                                                                                                                                         |\n| Background:  | This unique Australian airworthiness directive (AD), issued in 1956, required a rubber sleeve to be installed on the oxygen line in accordance with Cessna SL 310-7 to prevent the possibility of chafing. Compliance with the AD was forthwith. As all aircraft would now be modified, the unsafe condition no longer exists. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n27 February 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 310/3","sectionType":"part","heading":"AD/CESSNA 310/3","content":"## AD/CESSNA 310/3","sortOrder":1},{"sectionNumber":"Oxygen Line - Modification","sectionType":"part","heading":"Oxygen Line - Modification","content":"## Oxygen Line - Modification","sortOrder":2},{"sectionNumber":"4/2008","sectionType":"part","heading":"4/2008","content":"## 4/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1023},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The scope remains consistent with the original purpose. The legislation originally required a specific safety modification; this instrument simply terminates that requirement because the safety objective has been achieved across the fleet. There is no scope creep or expansion."},"complexity_factors":["Single substantive operation (cancellation of previous instrument)","No defined terms or interpretation section","No cross-references to other legislation apart from the original AD being cancelled","No conditional logic or exceptions","Document length is extremely short (under 200 words of substance)"],"plain_english_summary":"**What this document does:** It officially cancels an old aircraft safety rule that is no longer needed.\n\n**The original rule (from 1956):** Owners of Cessna 310 aeroplanes had to install a rubber protective sleeve around the oxygen supply line. This prevented the metal line from rubbing (chafing) against the aircraft frame and potentially causing a leak or fire. The work had to be done immediately (\"forthwith\").\n\n**Why it is being cancelled:** The rule was issued in 1956. By 2008—more than 50 years later—all affected aircraft would have been modified long ago. The unsafe condition no longer exists, so keeping the rule on the books serves no purpose.\n\n**Who this affects:** Owners, operators, and maintenance engineers of Cessna 310 series aircraft. For them, this cancellation removes an obsolete compliance obligation.\n\n**Key takeaway:** This is housekeeping—removing a half-century-old safety requirement that everyone has already followed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled","history":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled/history","analysis":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled/analysis","conflicts":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled/important-cases","documents":"/api/acts/ad-cessna-310-3-oxygen-line-modification-cancelled/documents"}}