{"id":"F2006B08128","name":"AD/CESSNA 303/12 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-cessna-303-12-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":115255,"registerId":"commonwealth-F2006B08128-current","compilationNumber":null,"startDate":"2026-04-03","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/CESSNA 303/12 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/CESSNA 303/12","sectionType":"part","heading":"AD/CESSNA 303/12","content":"# AD/CESSNA 303/12\n\n## Amdt 1\n\nApplicability: Model T303. Requirement: Revise:\n\n  \n\n## Aircraft Flight Manual, Flight into Icing Conditions\n\n  \n7/2000","sortOrder":1},{"sectionNumber":"Amdt 1","sectionType":"part","heading":"Amdt 1","content":"## Amdt 1\n\nApplicability: Model T303. Requirement: Revise:","sortOrder":2},{"sectionNumber":"Aircraft Flight Manual, Flight into Icin","sectionType":"part","heading":"Aircraft Flight Manual, Flight into Icing Conditions","content":"## Aircraft Flight Manual, Flight into Icing Conditions\n\n  \n7/2000","sortOrder":3},{"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\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\n    accumulation of ice on the upper surface of the wing aft of the protected area, and/or\n\n    accumulation of ice on the engine nacelles and propeller spinners farther aft than normally observed.","sortOrder":4},{"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":5},{"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":6}],"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":"This amendment replaces the prior AD text by specifically requiring a revision to the Aircraft Flight Manual for Model T303 to add warnings, visual cues identifying severe icing, conducive weather conditions, and prescribed exit procedures. Applicability remains limited to Model T303; the change expands AFM content and pilot obligations rather than extending the AD to additional aircraft types."},"complexity_factors":["Technical subject matter: aviation icing phenomena and operational responses require specialist understanding by pilots and maintainers.","Operational judgement: triggers for action depend on visual cues (e.g. ice aft of protected surfaces), which are inherently subjective.","Compliance action: owners/operators must revise the Aircraft Flight Manual and ensure crews follow the new procedures.","Limited applicability: applies only to Model T303, reducing regulatory breadth but concentrating compliance on a defined fleet.","Enforcement/interpretation ambiguity: phrases like \"severe icing\" and \"shall be determined by the visual cues\" leave room for judgment about when mandatory actions are required.","Air traffic coordination: the requirement to \"request priority handling from Air Traffic Control\" creates a dependency on ATC availability and may affect flight planning."],"plain_english_summary":"This amendment requires owners/operators of Cessna Model T303 to revise the Aircraft Flight Manual to add warnings, visual cues, weather conditions, and procedures for recognising and exiting severe in‑flight icing (including freezing rain, freezing drizzle and mixed icing). It affects pilots and operators by imposing a manual change and operational steps — monitor ambient temperature, watch for specified ice‑accumulation cues, and immediately request ATC priority to change route or altitude to exit dangerous icing."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: addressing icing hazards for the Cessna T303. It simply updates the flight manual requirements without expanding to other aircraft types or introducing new regulatory mechanisms."},"complexity_factors":["Very short document (approximately 300 words)","No defined terms section — all language is plain English","No cross-references to other legislation beyond the single mention of CAR 1998 subregulation 39.1(1)","Simple structure: applicability, requirement, warning, weather conditions, procedures","Single condition: only applies to Model T303 aircraft","No nested exceptions or conditional logic — straightforward mandatory action"],"plain_english_summary":"This AD revokes and replaces the prior Cessna T303 notice and requires updating the Aircraft Flight Manual with new warnings and procedures about severe icing. It responds to icing conditions that can exceed the T303’s de-icing capability and potentially cause loss of control.\n\nOwners, operators, and pilots of Cessna Model T303 aircraft in Australia must recognize severe-icing cues, avoid known freezing-moisture conditions, and take immediate actions (including requesting ATC assistance to change altitude or route) to escape hazardous icing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-cessna-303-12-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}