{"id":"F2006B08280","name":"AD/CESSNA 340/34 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-cessna-340-34-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":115598,"registerId":"commonwealth-F2006B08280-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 340/34 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 340/34","sectionType":"part","heading":"AD/CESSNA 340/34","content":"# AD/CESSNA 340/34\n\n## Amdt 1\n\nApplicability: Model 340A. 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 340A. 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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the Airworthiness Directive. It updates the required flight manual text but does not expand applicability to new aircraft types, add new compliance requirements, or broaden the safety issue being addressed beyond the original icing conditions concern for the Cessna 340A."},"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 mention of CAR 1998 subregulation 39.1(1) (the enabling power)","Simple structure: applicability, requirement, and substantive content (warning text)","No conditional logic or nested exceptions — the requirement is absolute and straightforward","Single amendment (Amdt 1) replacing a previous version of the same directive"],"plain_english_summary":"This AD requires Cessna 340A owners/operators in Australia to revise the Aircraft Flight Manual with new warnings and procedures about severe icing. It warns that dangerous ice can form—even with de-icing on and at temperatures down to about −18°C or near freezing with visible moisture—and tells pilots to monitor OAT and request immediate priority ATC assistance to change altitude/route if encountering severe icing."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument expressly revokes the earlier AD/CESSNA 340/34 and issues a replacement that mandates a specific Aircraft Flight Manual revision for Model 340A (source: opening paragraph and \"Requirement: Revise...\"). The AD therefore changes the regulatory instrument in force. The supplied text does not include the previous AD's full content, so the precise extent of substantive change to obligations cannot be determined from this document alone."},"complexity_factors":["Narrow applicability: applies only to Cessna Model 340A (source: \"Applicability: Model 340A\").","Single mandated action: requires revision of the Aircraft Flight Manual to include icing warning and procedures (source: \"Requirement: Revise: Aircraft Flight Manual, Flight into Icing Conditions\").","Operational technical content: adds meteorological cues and temperature guidance (e.g. warnings about freezing rain/drizzle and icing as cold as -18°C), which affects pilot decision-making and training.","Administrative authority and procedure: issued under CAR 1998 subregulation 39.1(1) and explicitly revokes the prior AD, so it replaces a previous regulatory instrument (source: opening paragraph).","Compliance ambiguity in the text: the AD references compliance timing and sections but the supplied extract does not state a specific compliance deadline or detailed amendment text, creating potential uncertainty for implementers.","Who bears cost: operators/owners must update manuals and train crews; enforcement and oversight fall to the regulator (implied by directive format and applicability).","Safety-critical enforcement: because the requirements change operational behaviour in flight, timely and accurate implementation is necessary, increasing implementation risk if the manual revision is delayed or misunderstood."],"plain_english_summary":"This Airworthiness Directive requires operators of Cessna Model 340A aircraft to revise the Aircraft Flight Manual to add a warning and specific procedures about severe in-flight icing. It sets visual cues that indicate icing exceeding certification limits, identifies weather likely to produce severe ice, and instructs pilots to request ATC priority and exit the conditions. It affects owners, operators and flight crews by creating a mandatory manual change and associated operational obligations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-cessna-340-34-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}