{"id":"F2006B08298","name":"AD/CESSNA 400/110 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-cessna-400-110-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":115629,"registerId":"commonwealth-F2006B08298-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 issues the following Airworthiness Directive (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 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 400/110 Aircraft Flight Manual","sectionType":"part","heading":"AD/CESSNA 400/110 Aircraft Flight Manual, Flight into Icing","content":"## AD/CESSNA 400/110 Aircraft Flight Manual, Flight into Icing\n\nConditions\n\nApplicability: Models 402B, 402C, 404, F406, 414, 414A, 421B, 421C, 425, and 441.\n\nRequirement: Revise:","sortOrder":1},{"sectionNumber":"3/2000","sectionType":"part","heading":"3/2000","content":"## AD/CESSNA 400/110 Aircraft Flight Manual, Flight into Icing\n\nConditions\n\nApplicability: Models 402B, 402C, 404, F406, 414, 414A, 421B, 421C, 425, and 441.\n\nRequirement: Revise:\n\n##   \n3/2000","sortOrder":2},{"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 lower 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":3},{"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":4},{"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":5}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific unsafe icing condition in specific Cessna aircraft models. The content is focused entirely on flight manual revisions for icing awareness and has not expanded beyond this aviation safety purpose."},"complexity_factors":["Very short document (approximately 400 words)","No defined terms section — all language is plain operational English","No cross-references to other legislation or regulations beyond a single citation to CAR 1998 subregulation 39.1(1)","Simple structure: applicability → requirement → warning → procedures","Single unconditional mandate: revise the flight manual with specified text","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of listed Cessna twin‑engine models to update their Aircraft Flight Manuals with new warnings and escape procedures for severe icing. It responds to freezing rain/drizzle and mixed‑phase conditions that can overwhelm ice protection and render the aircraft uncontrollable.\n\nPilots must watch for abnormal ice buildup or rain at subzero temperatures and take immediate action to exit icing."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive confines its scope to revising the Aircraft Flight Manual for the listed models to add warnings, visual cues, and exit procedures for severe icing. It does not impose airframe modifications, inspections, or extend applicability to other aircraft types in the provided text."},"complexity_factors":["Narrow applicability: specific Cessna models (402B, 402C, 404, F406, 414, 414A, 421B, 421C, 425, 441) reduces regulatory breadth.","Single mandated action: revise Aircraft Flight Manual (AFM) rather than mandate physical modifications lowers technical complexity.","Operational judgment required: reliance on pilot visual cues (ice accumulation locations) introduces subjectivity and variability in compliance.","Procedural coordination: requires pilots to request ATC priority and change route/altitude, which depends on external ATC availability.","Implementation burden: manual revision, dissemination, and crew training/documentation impose administrative and training costs on operators.","Enforcement discretion: compliance timing and verification are set by the CASA delegate process rather than detailed in the excerpt."],"plain_english_summary":"This Airworthiness Directive requires operators of listed Cessna models to revise the Aircraft Flight Manual to add a warning about severe in‑flight icing, list visual cues and weather conditions that may produce it, and set procedures for exiting such conditions (monitor ambient air temperature; request priority ATC handling to change route or altitude). It affects aircraft owners/operators and flight crews who must update manuals and train personnel; they bear the administrative and training costs and will change in‑flight decision making when visual cues appear."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-cessna-400-110-aircraft-flight-manual-flight-into-icing-conditions/documents"}}