{"id":"F2011L01215","name":"CASA EX59/11 – Exemption – take-off with residual traces of frost and ice","slug":"casa-ex59-11-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repealed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":125432,"registerId":"commonwealth-F2011L01215-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA EX59/11 – Exemption – take-off with residual traces of frost and ice","content":"Instrument number CASA EX59/11\n\nI, GERARD JOHN CAMPBELL, Acting Executive Manager, CASA Operations Division, a delegate of CASA, make this instrument under regulation 308 of the Civil Aviation Regulations 1988 (CAR 1988).\n\n\\[Signed G.J. Campbell\\]\n\nGerard J. Campbell  \nActing Executive Manager  \nCASA Operations Division\n\n17 June 2011\n\nExemption — take-off with residual traces of frost and ice\n\n1 Duration\n\nThis instrument:\n\n(a) commences on 1 July 2011; and\n\n(b) stops having effect at the end of June 2013.\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:\n\n> 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":2729},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is the original instrument as made, establishing a temporary exemption with a specific safety purpose. The scope remains tightly confined to residual frost/ice traces on large commercial aircraft and has not expanded beyond this original intent."},"complexity_factors":["Only one defined term ('appropriate procedures') in the interpretation section","Simple linear structure with two substantive conditions and no nested exceptions","Narrow application scope limited by aircraft weight (5,700 kg) and operation type (regular public transport)","Minimal cross-referencing (only to CAR 1988 regulation 244(1)(c))"],"plain_english_summary":"This instrument lets pilots‑in‑command of large, scheduled commercial aircraft depart with only tiny residual traces of frost or ice after proper de‑icing, where complete elimination is impractical.  \n\nIt’s conditional: the pilot must have applied appropriate de‑icing and personally judged that any remaining traces won’t impair flight performance or instruments — balancing operational practicality with safety."}},"importantCases":[],"_links":{"self":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice","history":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice/history","analysis":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice/analysis","conflicts":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice/conflicts","importantCases":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice/important-cases","documents":"/api/acts/casa-ex59-11-exemption-take-off-with-residual-traces-of-frost-and-ice/documents"}}