{"id":"F2009L02313","name":"CASA EX50/09 – Exemption – take-off with residual traces of frost and ice","slug":"casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":162201,"registerId":"commonwealth-F2009L02313-current","compilationNumber":null,"startDate":"2026-04-04","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA EX50/09 – Exemption – take-off with residual traces of frost and ice","content":"Instrument number CASA EX50/09\n\nI, MICHAEL DAVID QUINN, Deputy Chief Executive Officer, Operations, a delegate of CASA, make this instrument under regulation 308 of the Civil Aviation Regulations 1988 (CAR 1988).\n\n\\[Signed M.D. Quinn\\]\n\nMick Quinn  \nDeputy Chief Executive Officer  \nOperations\n\n23 June 2009\n\nExemption — take-off with residual traces of frost and ice\n\n1 Duration\n\nThis instrument:\n\n(a) commences on 1 July 2009; and\n\n(b) stops having effect at the end of 30 June 2011.\n\n2 Application\n\nThis instrument applies only to the pilot in command of an aircraft that:\n\n(a) is engaged in regular public transport operations; and\n\n(b) has a maximum take-off weight of more than 5 700 kg.\n\n3 Exemption\n\nThe pilot in command is exempt from compliance with paragraph 244 (1) (c) of CAR 1988.\n\n4 Conditions\n\nThe exemption is subject to the conditions mentioned in Schedule 1.\n\nSchedule 1 Conditions\n\n1 In this Schedule, appropriate procedures means de-icing and anti-icing procedures that are:\n\n(a) effective in the ambient meteorological conditions and temperatures; and\n\n(b) carried out in accordance with whichever of the following is applicable to take-off in those conditions and temperatures:\n\n(i) the aircraft flight manual; or\n\n(ii) instructions and data provided by the aircraft manufacturer.\n\n2 Before taking off, the pilot in command must ensure that appropriate procedures have been used to remove from the aircraft all accumulated snow, frost and ice other than residual traces.\n\n3 Immediately before taking off, the pilot in command must be satisfied that any residual traces of snow, frost or ice will not affect the performance of:\n\n(a) the aircraft; or\n\n(b) any of its equipment or instruments.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1680},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument maintains its original narrow purpose: a time-limited exemption permitting residual frost/ice traces only on large commercial aircraft conducting regular public transport operations, subject to strict safety conditions."},"complexity_factors":["Single defined term ('appropriate procedures')","Brief two-year sunset clause with fixed dates","Simple application criteria limited to aircraft weight and operation type","External references to aircraft flight manuals and manufacturer data","Clear, un-nested conditional structure"],"plain_english_summary":"Temporarily allowed commercial pilots in command of large transport aircraft (MTOW > 5,700 kg) to take off with minute “residual traces” of frost or ice, provided they first carried out appropriate de‑icing/anti‑icing, removed all accumulated contamination except those traces, and confirmed immediately before take‑off that any remaining traces would not affect performance or instruments. In force 1 July 2009–30 June 2011."}},"importantCases":[],"_links":{"self":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice","history":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice/history","analysis":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice/analysis","conflicts":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice/conflicts","importantCases":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice/important-cases","documents":"/api/acts/casa-ex50-09-exemption-take-off-with-residual-traces-of-frost-and-ice/documents"}}