{"id":"F2006B07182","name":"AD/SWSA226/42 Amdt 1 - Prohibition of Flight into Known Icing Conditions - Placard","slug":"ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114948,"registerId":"commonwealth-F2006B07182-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/42 Amdt 1 - Prohibition of Flight into Known Icing Conditions - Placard","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/42\n\nAmdt 1\n\n\nProhibition of Flight into Known Icing Conditions - Placard\n\n\n12/82\n\n \n\nApplicability: Models SA227-AC, SA227-AT, SA227-TT, not modified in accordance with SA227 Service Bulletin A61-002 or Service Bulletin 30-001.\n\n \n\nRequirement: Install a placard, minimum 1/4\" lettering on the instrument panel in plain view of the pilot stating “Flight into known icing conditions prohibited”.\n\n \n\nCompliance: Forthwith.\n\n \n\nBackground: Overseas operational experience indicates that propeller de-icing is not adequate.\n\nFAA Directive 82-05-05 withdraws approval for operation in icing conditions.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The document is titled as an amendment (Amdt 1) to AD/SWSA226/42, which indicates it modifies a prior airworthiness directive. The text provided sets out the current requirement (placard installation), applicability, compliance timing and background, but does not include the earlier version or say precisely how the scope has been altered from the prior text. Therefore the instrument is an amendment (a change has been made), but the exact prior-versus-current differences cannot be determined from this document alone (Header: “Amdt 1”; Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability to three specific SA227 variants (Applicability)","Single, simple physical action required (install placard) rather than technical retrofit (Requirement)","Immediate compliance required (Compliance: Forthwith)","Exclusion for aircraft modified under two specific service bulletins introduces conditional scope (Applicability)","Operational effect (prohibition on flights in known icing) is regulatory rather than technical, which affects pilot behaviour rather than aircraft hardware (Requirement)","Background references an external regulator (FAA) but the directive does not reproduce technical analysis, creating a reliance on external material (Background)","No enforcement or penalty detail included in the text, leaving implementation and oversight mechanisms unspecified"],"plain_english_summary":"This directive requires owners/operators of specified Fairchild (Swearingen) SA227 variants to immediately install a cockpit placard reading “Flight into known icing conditions prohibited” (1/4\" lettering, pilot‑visible), unless the aircraft has been modified per two named service bulletins. It’s a low‑cost, operational prohibition prompted by inadequate propeller de‑icing experience and an FAA withdrawal of icing approval."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific technical deficiency in specific aircraft models. The scope remains tightly focused on the original safety concern regarding propeller de-icing inadequacy."},"complexity_factors":["Very short document (under 200 words)","Only 3 defined models in applicability section","Single, straightforward requirement with clear physical specifications (1/4\" lettering)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: applies to specific models UNLESS modified by specific service bulletins","No nested exceptions or complex compliance timelines"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** Requires owners/operators of certain Fairchild Swearingen SA226 and SA227 series aircraft to install a warning placard (sign) on the instrument panel stating **\"Flight into known icing conditions prohibited\"**. The placard must use letters at least 1/4 inch (about 6mm) high and be clearly visible to the pilot.\n\n**Who it affects:** Owners and operators of specific Fairchild Swearingen models: SA227-AC, SA227-AT, and SA227-TT — but **only if** these aircraft haven't been modified according to two specific service bulletins (SA227 Service Bulletin A61-002 or Service Bulletin 30-001).\n\n**Why it matters:** Overseas experience showed these aircraft have inadequate propeller de-icing systems, making flight in icing conditions dangerous. The US Federal Aviation Administration (FAA) had already withdrawn approval for icing operations. This Australian directive ensures pilots are explicitly warned not to fly into known icing conditions, preventing potential accidents caused by ice buildup on the aircraft.\n\n**When compliance is required:** Immediately (\"Forthwith\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard","history":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard/history","analysis":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard/analysis","conflicts":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard/conflicts","importantCases":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard/important-cases","documents":"/api/acts/ad-swsa226-42-amdt-1-prohibition-of-flight-into-known-icing-conditions-placard/documents"}}