{"id":"F2006B07511","name":"AD/TSA-600/47 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50008,"registerId":"commonwealth-F2006B07511-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/TSA-600/47 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/TSA-600/47","sectionType":"part","heading":"AD/TSA-600/47","content":"# AD/TSA-600/47\n\nAmdt 1\n\n  \n\nAircraft Flight Manual, Flight into Icing Conditions\n\n  \n7/2000","sortOrder":1},{"sectionNumber":"\"WARNING\"","sectionType":"part","heading":"\"WARNING\"","content":"# \"WARNING\"\n\nSevere icing may result from environmental conditions outside of those for which the aircraft is certificated.\n\nFlight in freezing rain, freezing drizzle, or mixed icing conditions (super cooled liquid water and ice crystals) may result in:\n\n    ice build-up on protected surfaces and exceed the capability of the ice protection system, or\n    ice forming aft of the protected surfaces.\n\nThis ice may not be shed using the ice protection systems, and may seriously degrade the performance and controllability of the aircraft.\n\nDuring flight, severe icing conditions that exceed those for which the aircraft is certificated shall be determined by the visual cues described below. If one or more of these visual cues exists, immediately request priority handling from Air Traffic Control to facilitate a route or an altitude change to exit the icing conditions. The cues are:\n\n    unusually extensive ice accumulation on the airframe and windscreen in areas not normally observed to collect ice, and/or\n    accumulation of ice on the upper surface of the wing aft of the protected area, and/or\n    accumulation of ice on the engine nacelles and propeller spinners farther aft than normally observed.","sortOrder":2},{"sectionNumber":"THE FOLLOWING WEATHER CONDITIONS MAY BE ","sectionType":"part","heading":"THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:","content":"# THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:\n\n    Visible rain at temperatures below 0 degrees Celsius ambient air temperature;\n    Droplets that splash or splatter on impact at temperatures below 0 degrees Celsius ambient air temperature.","sortOrder":3},{"sectionNumber":"PROCEDURES FOR EXITING A SEVERE ICING","sectionType":"part","heading":"PROCEDURES FOR EXITING A SEVERE ICING","content":"# PROCEDURES FOR EXITING A SEVERE ICING\n\nENVIRONMENT: (These procedures are applicable to all flight phases from take-off to landing.)\n\nMonitor the ambient air temperature.\n\nWhile severe icing may form at temperatures as cold as \\-18 degrees Celsius, increased vigilance is warranted at temperatures around freezing when visible moisture is present.","sortOrder":4}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument explicitly revokes the prior AD and issues a replacement focused on AFM warnings and in‑flight procedures for severe icing. The replacement emphasises visual cues, lists weather conditions (freezing rain/drizzle, splashing droplets) and mandates pilot actions (monitor temperature, request ATC priority), thereby supplanting the prior AD text and altering the active guidance operators must follow."},"complexity_factors":["Revocation and reissue of an AD — regulatory step replacing prior mandatory instrument (preamble: revokes AD/TSA-600/47 and issues following AD).","Operational reliance on pilot judgment — identification of severe icing depends on visual cues rather than measurable system thresholds (see WARNING: visual cues listed).","Procedural obligations for in‑flight action — requirement to request ATC priority and effect route/altitude changes (see PROCEDURES FOR EXITING A SEVERE ICING).","Broad applicability across flight phases — procedures apply from take‑off to landing (see PROCEDURES FOR EXITING A SEVERE ICING: applicable to all flight phases).","Non‑prescriptive format — guidance is warnings and procedures rather than prescriptive maintenance or technical modifications (document framed as Aircraft Flight Manual content).","Operational monitoring requirement — explicit duty to monitor ambient air temperature (see final paragraph).","Potential downstream compliance tasks — likely need for flight manual amendment, crew training and operational briefings (implied by instrument being AFM material)."],"plain_english_summary":"This amendment replaces AD/TSA-600/47 with updated Aircraft Flight Manual guidance about severe in‑flight icing. It tells pilots and operators to recognise specific visual cues, monitor ambient air temperature, identify weather (eg. visible freezing rain/drizzle) that may produce severe ice, and immediately request ATC priority to change route or altitude to exit icing. It affects pilots and operators by adding in‑flight recognition duties and required responses to suspected severe icing."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the AD. It is Amendment 1 to an existing directive, suggesting refinement rather than expansion. The content remains tightly focused on flight manual updates and pilot procedures for icing conditions for the TSA-600 aircraft type. No broadening to other aircraft types, operational phases, or regulatory areas is evident."},"complexity_factors":["Single, clearly defined applicability (TSA-600 aircraft)","Straightforward compliance structure: update flight manual, train pilots on visual cues, follow exit procedures","Minimal cross-referencing (only references subregulation 39.1(1) of CAR 1998 for legal authority)","No nested exceptions or conditional logic — requirements apply uniformly","Short, directive-style language with clear imperative verbs ('shall', 'must' implied)","Visual formatting aids comprehension (bulleted lists, capitalized headers, 'WARNING' callouts)","Limited defined terms (only standard aviation terminology like 'ambient air temperature', 'protected surfaces')"],"plain_english_summary":"This AD replaces AD/TSA-600/47 and orders operators and pilots of TSA-600 series aircraft to address severe icing hazards that can overwhelm built‑in protection. It requires updated flight manual warnings, pilot training to recognize abnormal ice accumulation, and immediate procedures (including priority ATC assistance) to escape icing, plus vigilant outside‑air‑temperature and weather awareness.\n\nIt matters because unseen or persistent ice can degrade control and performance, risking loss of the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-tsa-600-47-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}