{"id":"F2006B04280","name":"AD/BEECH 90/97 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-beech-90-97-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":44086,"registerId":"commonwealth-F2006B04280-current","compilationNumber":null,"startDate":"2026-04-02","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/BEECH 90/97 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 90/97","sectionType":"part","heading":"AD/BEECH 90/97","content":"# AD/BEECH 90/97\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 remains tightly focused on its original purpose: addressing flight manual requirements for icing conditions in Beech 90 aircraft. The amendment appears to update and replace the original AD/BEECH 90/97 with revised warning text and procedures, without expanding to other aircraft types, systems, or operational contexts."},"complexity_factors":["Short, single-purpose directive (approximately 500 words)","Only 3 defined structural sections (WARNING, weather conditions, exit procedures)","Minimal cross-referencing — only references subregulation 39.1(1) of CAR 1998 and the previous directive being revoked","Clear, imperative language throughout ('shall', 'immediately request')","No nested exceptions or conditional logic beyond basic 'if/then' safety instructions","Single applicability criterion (Beech 90 series aircraft implied by directive naming convention)"],"plain_english_summary":"This AD replaces an earlier order for certain Beechcraft 90-series aircraft and legally requires updating the Aircraft Flight Manual with warnings and emergency procedures about severe icing—especially from freezing rain or drizzle—that can exceed the aircraft’s ice protection. It affects owners, operators, pilots and maintenance organisations: compliance (AFM insertion and following the escape procedures) is mandatory to reduce loss-of-control risk."},"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 AD revokes the prior AD and explicitly adds AFM warnings and procedural requirements addressing severe icing beyond the aircraft's certificated envelope (including freezing rain, freezing drizzle and mixed icing). It defines visual cues and prescribes exit actions and ATC priority requests, thereby broadening and clarifying the operational scope operators must address and requiring AFM updates and crew procedural changes. Enforcement is by the CASA delegate under subregulation 39.1(1) of CAR 1998."},"complexity_factors":["Narrow regulatory change: primarily requires AFM text and crew procedures rather than technical retrofits.","Operational judgment: pilots must identify subjective 'visual cues' of severe icing (discretion in real time).","Compliance burden: operators must amend manuals and train crews, incurring administrative and training costs.","Enforcement path is standard: revocation and reissue under subregulation 39.1(1) of CAR 1998 (administrative clarity).","Safety-critical context increases consequence of misidentification, despite low statutory complexity."],"plain_english_summary":"**This amendment revokes the earlier directive and requires Aircraft Flight Manuals to include a warning and specific procedures about severe in‑flight icing (including freezing rain, freezing drizzle and mixed conditions).** It affects pilots and aircraft operators by imposing crew actions—monitor ambient temperature, recognise defined visual cues of severe icing, request priority handling from ATC and change route/altitude to exit—and by creating an administrative task to update manuals and procedures. The CASA delegate enforces the requirement under CAR 1998; operators bear implementation and training costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-beech-90-97-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}