{"id":"F2006B04161","name":"AD/BEECH 65/67 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-beech-65-67-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":43892,"registerId":"commonwealth-F2006B04161-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.002.png)![](image.002.png)AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BEECH 65/67 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/BEECH 65/67","sectionType":"part","heading":"AD/BEECH 65/67","content":"# AD/BEECH 65/67\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":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment appears to maintain the original scope — addressing flight into icing conditions for specific Beechcraft aircraft. It replaces a previous version of the same directive but does not expand beyond the original safety purpose of managing icing risks in these aircraft types."},"complexity_factors":["Short, single-purpose document (approximately 400 words)","No defined terms section — uses plain language descriptions","Minimal cross-referencing (only references the regulation it is issued under: CAR 1998 subregulation 39.1(1))","Simple conditional structure: 'If you see X, do Y'","Clear, prescriptive requirements with no nested exceptions","Single applicability (Beech 65/67 aircraft only)","Visual formatting aids comprehension (bolding, bullet points, warning boxes)"],"plain_english_summary":"This AD applies to Beechcraft Model 65 and 67 aircraft and revokes/replaces a prior directive about flight in icing conditions. It warns that these twins can encounter severe icing (freezing rain, mixed conditions) that outstrips certified protections, causing uncontrollable ice buildup. Pilots/operators must watch for atypical ice on wings/engine covers and seek immediate ATC priority to change altitude/route to escape—critical to prevent loss of control and fatal accidents."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment updates and clarifies Aircraft Flight Manual content and pilot procedures about severe icing for the specified Beech models. It does not broaden the class of affected aircraft or add new regulatory powers; it replaces the prior AD with revised AFM text and guidance. In practical terms the scope is a refinement and operational clarification (stronger procedural guidance and explicit visual cues) rather than a significant expansion beyond the original safety objective."},"complexity_factors":["Short, focused document limited to AFM warning text and exit procedures","One external statutory cross‑reference (CAR 1998 subregulation 39.1(1)) in the preamble","No extensive defined‑term list or dense legislative language in the excerpt","Relies on subjective, visual cues (introduces operational ambiguity in application)","References a compliance section (not included) creating a small dependency on cross‑referenced timing","Multiple conditional weather/temperature thresholds (0°C and −18°C) and mixed‑condition descriptions"],"plain_english_summary":"**What this directive does**\n\n- Requires an amendment to the Aircraft Flight Manual (AFM) for Beech 65/67 aircraft to add a warning and specific procedures about severe in‑flight icing. The AD revokes the previous version and issues the replacement under the Civil Aviation Regulations (see the preamble referencing subregulation 39.1(1) of CAR 1998).\n\n**Who is affected**\n\n- Aircraft owners and operators of the Beech 65/67 type (those required to hold and use the AFM), maintenance organisations that insert or approve AFM changes, and flight crew who must follow the AFM's operational guidance. Air Traffic Control (ATC) is indirectly involved because the crew are instructed to request priority handling when exiting severe icing.\n\n**What the AFM amendment requires (mechanics of the rule)**\n\n- Insert a prominent \"WARNING\" that advises severe icing can occur in environmental conditions outside those for which the aircraft was certificated. (\"WARNING\" section in the AD text.)\n- Explain that freezing rain, freezing drizzle, or mixed icing (supercooled liquid water plus ice crystals) may: (a) cause ice build-up on protected surfaces exceeding the ice protection system capability, or (b) cause ice to form aft of protected surfaces and not be shed by the ice protection systems. (\"WARNING\" section.)\n- Provide visual cues for flight crew to recognise severe icing and direct the crew to immediately request priority handling from ATC to facilitate a route or altitude change when one or more cues are present. The cues listed are: unusually extensive ice accumulation in unexpected areas; ice on the upper wing surface aft of the protected area; and ice on engine nacelles and propeller spinners farther aft than normally observed. (\"WARNING\" section.)\n- List weather conditions that may be conducive to severe icing: visible rain with ambient air temperature below 0°C, and droplets that splash or splatter on impact at ambient temperatures below 0°C. (\"THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN‑FLIGHT ICING\" section.)\n- Provide \"Procedures for Exiting a Severe Icing Environment\" that apply in all flight phases: monitor ambient air temperature; note that severe icing can occur at temperatures as cold as −18°C but increased vigilance is required around 0°C when visible moisture is present, and act to exit the conditions (\"PROCEDURES FOR EXITING A SEVERE ICING\" section).\n\n**Why this matters (stated purpose and practical effects)**\n\n- Stated purpose: to correct an unsafe condition by ensuring AFM guidance warns crews that severe icing can occur outside certificated conditions and gives concrete cues and procedures to identify and exit such icing.\n- Who pays: aircraft operators bear the direct, modest costs of amending AFMs, distributing the change to crews, and training/briefing pilots. Indirect operational costs may arise when crews request priority handling, change altitude or routing, or divert to avoid icing (fuel, time, scheduling consequences).\n- Who decides and how behaviour changes: the CASA delegate issues the AD (regulator decision). Flight crew decide in real time whether visual cues are present and whether to request priority ATC handling and change route/altitude. Maintenance or documentation staff decide how and when the AFM pages are incorporated.\n\n**Trade‑offs, compliance and implementation risks**\n\n- The AD relies on crew recognition of visual cues; that is subjective and may vary by experience and visibility. (See the visual cues listed in the \"WARNING\" section.)\n- Implementation requires AFM amendment insertion and crew briefings; these are straightforward but must be tracked to ensure compliance (administrative burden). The AD references timing in a compliance section (not reproduced here), so operators must check the specific compliance deadline.\n- Operational trade‑off: exiting icing via altitude or routing changes may increase fuel use, flight time or require diversion; the AD expects crews to prioritise leaving severe icing over operational efficiency.\n\n**Net effect on private activity and competition**\n\n- The AD imposes operational constraints (additional warnings and mandated crew actions) that apply equally to all operators of the affected aircraft type; it does not create exemptions or favour particular operators. Effects on competition are limited: any increased cost of compliance or operational delays are diffuse across operators of the model rather than concentrated on a subset.\n\n(Headings and quotes above refer to the AD text: \"WARNING\", \"THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN‑FLIGHT ICING\", and \"PROCEDURES FOR EXITING A SEVERE ICING\".)"},"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-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-beech-65-67-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}