{"id":"F2006B08184","name":"AD/CESSNA 310/57 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-cessna-310-57-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":115391,"registerId":"commonwealth-F2006B08184-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 310/57 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 310/57","sectionType":"part","heading":"AD/CESSNA 310/57","content":"# AD/CESSNA 310/57\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\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":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":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The instrument explicitly revokes the prior AD and issues an amendment (\"revokes Airworthiness Directive ... and issues the following AD\"), replacing the prior directive with new AFM warnings and mandatory procedures for severe icing. The replacement adds specific visual cues and prescribes immediate actions such as requesting ATC priority and monitoring ambient air temperature (see Warning and Procedures for Exiting a Severe Icing Environment). Operators and pilots of the affected Cessna 310 aircraft therefore face new manual amendment, training and in‑flight compliance burdens."},"complexity_factors":["Regulatory action taken under delegated power and revocation of a prior AD (\"revokes Airworthiness Directive ... and issues the following AD under subregulation 39.1 (1) of CAR 1998\") — legal procedural layer adds formality and delegated discretion.","Requirement/Compliance linkage is referenced but timing/details sit in the AD’s requirement and compliance sections (\"The AD requires that the action set out in the requirement section ... be taken ... at the time mentioned in the compliance section\") — potential for operational ambiguity if those sections are unspecified here.","Operational judgement required: pilots must identify severe icing using visual cues rather than precise numeric thresholds (\"visual cues described below\"; warning lists unusual ice accumulation locations) — depends on in‑flight assessment.","Mandatory in‑flight actions include requesting ATC priority and changing route/altitude (Warning and Procedures sections) — imposes immediate decision and possible ATC coordination costs on the pilot/operator.","Practical compliance burden: updating the Aircraft Flight Manual and training crews to follow new warnings/procedures (title and repeated references to AFM and procedures).","Safety vs. ambiguity trade-off: the AD warns that severe icing can occur outside certificated conditions and gives examples of conducive weather, but uses descriptive cues (e.g. \"visible rain at temperatures below 0°C\") rather than instrument thresholds — this can increase judgement variance between crews."],"plain_english_summary":"Replaces the previous Cessna 310 AD and amends the Aircraft Flight Manual to add a warning and mandatory procedures for recognising and exiting severe in‑flight icing. It sets visual cues for pilots and requires immediate action such as requesting ATC priority and changing route or altitude to leave icing conditions.\n\nAffects Cessna 310 operators and pilots who must amend manuals, follow the in‑flight procedures and comply with the AD’s timing and instructions (see AD applicability, requirement and compliance sections)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment appears to maintain the original scope of the directive. It is Amendment 1 to an existing AD, suggesting a revision or update rather than expansion. The content remains focused on the specific safety issue of icing conditions for Cessna 310 aircraft, with no indication of broadened applicability or additional regulatory requirements beyond the original flight 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 beyond the single citation of CAR 1998 subregulation 39.1(1)","Simple structure: warning, weather conditions, procedures — no nested exceptions or conditional logic","Single applicability (Cessna 310 aircraft) with straightforward compliance requirements","Operational rather than legalistic drafting — reads like a pilot safety bulletin"],"plain_english_summary":"This AD for Cessna 310s updates mandatory procedures for flying in icing conditions. It affects owners, operators and pilots, and warns that standard ice protection may be insufficient for severe icing.\n\nPilots must recognize atypical ice buildup, be extra cautious when visible moisture exists at or below 0°C, monitor outside air temperature in flight, and immediately request priority ATC help to change altitude or route if severe icing is encountered."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-cessna-310-57-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}