{"id":"F2006B07180","name":"AD/SWSA226/40 - Prohibition of Flight into Known Icing Conditions - Placard","slug":"ad-swsa226-40-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":49118,"registerId":"commonwealth-F2006B07180-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/40 - Prohibition of Flight into Known Icing Conditions - Placard","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nFairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\nAD/SWSA226/40 Prohibition of Flight into Known\n\nIcing Conditions \\- Placard\n\n  \n2/82\n\nApplicability: Model SA226-T (S/Nos. T-205E; T-215E, T-201 thru T-275 and T-277 thru T-291); Model SA226-T(B) (S/Nos. T-276; T-303E; and T-292 thru T-419); Model SA226- AT (S/Nos. AT-003E, AT-038E, AT-062E, AT-064E and AT-001 thru AT- 419); and Model SA-226-TC (S/Nos. TC-211E, TC-211EE, TC-211EEE, TC-211EEEE, TC- 202E, TC-208E, TC-215E, TC- 222E, TC-222EE, TC-227E, TC-228E, TC-229E,\n\nTC-234E, TC- 237E, TC-238E, TC-239E, TC-255E, TC-246E, and TC-201 thru TC-\n\n419) aeroplanes not incorporating Fairchild Swearingen Corporation SB No. 74-002.\n\nRequirement: Install a placard, minimum 1/4 inch lettering, on the instrument panel in plain view of the pilot stating, “Flight into known icing conditions prohibited”. FAA AD 81-24-04 refers.\n\nCompliance: Within 10 hours time in service after 17 December, 1981.\n\nBackground: Two instances of engine flame-out and several cases of power loss due to the ingestion of propeller spinner ice were reported from overseas. FAA Directive No. 81-24-04 refers.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly focused on its original purpose: addressing the specific safety hazard of propeller spinner ice ingestion through a simple, targeted placard requirement. The scope has not expanded beyond this narrow safety fix."},"complexity_factors":["Single, straightforward requirement: install one placard with specific wording and minimum lettering size","Limited applicability: only affects specific aircraft models with specific serial number ranges, excluding those with a particular service bulletin","No nested conditions, exceptions, or cross-references beyond the reference to FAA AD 81-24-04","Clear compliance deadline: 10 hours time in service after a fixed date","No defined terms section or interpretation provisions","Background explanation is concise and directly relevant to the requirement"],"plain_english_summary":"This AD requires owners/operators of specified Fairchild Swearingen SA226/SA227 aircraft (unless modified per Service Bulletin 74‑002) to install a visible instrument‑panel placard reading \"Flight into known icing conditions prohibited\" (letters ≥6 mm). It’s a simple, low‑cost safety measure to prevent propeller‑spinner ice ingestion that has caused engine flame‑outs and power loss."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD's scope matches its stated objective: it targets specified serial-numbered aircraft without SB No. 74-002 and mandates a cockpit placard to prohibit flight into known icing conditions. The measure is narrowly tailored to those aircraft and does not expand beyond that set (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability requires checking specific models and detailed serial number ranges to determine if an aircraft is covered (Applicability).","Exception for aeroplanes 'not incorporating Fairchild Swearingen Corporation SB No. 74-002' creates an administrative verification step to confirm modification status (Applicability).","Low‑technology, prescriptive requirement: install a placard with specified wording and minimum 1/4 inch lettering on the instrument panel in plain view of the pilot — straightforward to implement but mandatory (Requirement).","Short compliance window: placard must be installed within 10 hours time in service after the specified date, requiring prompt action by operators (Compliance).","References FAA AD 81-24-04 and overseas incident reports as the stated safety trigger; the AD relies on those findings but does not reproduce investigative detail (Background, Requirement).","AD text does not specify enforcement mechanisms, penalties, or ongoing inspection regimes within the schedule entry itself — monitoring and enforcement are implied by the AD framework but not detailed here (Requirement/Compliance)."],"plain_english_summary":"Requires operators of specified Fairchild (Swearingen) SA226/SA227 aircraft (unless modified by SB No. 74-002) to install, within 10 hours, a cockpit placard reading “Flight into known icing conditions prohibited” in plain view of the pilot. The AD responds to reported engine flame‑outs and power loss from propeller‑spinner ice; it places a small compliance cost and an operational restriction on aircraft owners/operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard","history":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard/history","analysis":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard/analysis","conflicts":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard/conflicts","importantCases":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard/important-cases","documents":"/api/acts/ad-swsa226-40-prohibition-of-flight-into-known-icing-conditions-placard/documents"}}