{"id":"F2006B07208","name":"AD/SWSA226/66 - Nose Wheel Steering System","slug":"ad-swsa226-66-nose-wheel-steering-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48962,"registerId":"commonwealth-F2006B07208-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/66 - Nose Wheel Steering System","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/SWSA226/66 Nose Wheel Steering System 8/93\n\nApplicability: Models SA227-TT, SA227-AT, SA227-AC, and SA227-BC that have the nose wheel steering system modified in accordance with Fairchild Service Bulletin 227-32-030; and Model SA227-DC with serial numbers 784, and 790 through 825.\n\nRequirement: A Flight Manual Amendment is to be obtained from a District Airworthiness Office for placement into the Limitations Section of the Flight Manual; in order to incorporate the following nose wheel steering system limitations:\n\n    Check the nose wheel steering prior to each takeoff using the procedures in the Normal Procedures section of the Flight Manual.\n\n    b. The use of nose wheel steering for takeoff and landing is prohibited. Prior to each takeoff, turn the nose wheel arm switch to “OFF”, and do not turn to “ON” until after landing and the aircraft has slowed to taxi speed.\n\nNote: FAA AD 93-08-09 Amdt 39-8556 refers.\n\nCompliance: Prior to 31 August 1993.\n\nBackground: Incidents of nose wheel steering malfunctions have occurred on aircraft that have had the referenced nose wheel steering system modification incorporated.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope is limited to the listed models and serials and prescribes a Flight Manual amendment plus operational limits. The instrument does not expand or narrow that applicability within the text provided; it sets a specific compliance action and deadline."},"complexity_factors":["Narrow technical scope — specific SA227 models and listed serial numbers (Applicability).","Single, clear operational requirement: Flight Manual amendment and specific switch procedure (Requirement).","Fixed compliance deadline (Prior to 31 August 1993) reduces phased implementation complexity (Compliance).","Requires coordination with a District Airworthiness Office to obtain and insert the Flight Manual amendment (Requirement).","References an external FAA AD as related material (Note/Background).","Limited regulatory discretion shown; no exemption or alternative compliance pathway stated (Requirement)."],"plain_english_summary":"This AD requires operators of certain Fairchild SA227 aircraft with a modified nose‑wheel steering to add a Flight Manual amendment: perform a pre‑takeoff nose‑wheel steering check, keep the steering switch OFF for takeoff and landing, and only turn it ON after landing at taxi speed. (Requirement.)\n\nIt applies to listed models/serials; operators must obtain the amendment from a District Airworthiness Office and comply by 31 August 1993. Costs are administrative and operational (manual update, procedure, changed ground handling). Enforcement and discretion lie with the Civil Aviation Safety Authority. (Applicability; Compliance.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical issue in specific aircraft. It has not expanded beyond its original purpose of mandating operational limitations for the nose wheel steering system modification."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 specific aircraft models affected, with further serial number limitations","Single, clear operational requirement (Flight Manual amendment)","No defined terms section","No cross-references to other legislation (only a note about related FAA directive)","Simple conditional logic: if aircraft is in the listed models/serial numbers, then comply","Single compliance deadline with no exceptions or alternative methods"],"plain_english_summary":"This CASA Airworthiness Directive requires affected Fairchild Swearingen SA226/SA227 aircraft (certain modified SA227-TT/AT/AC/BC and SA227-DC S/N 784, 790–825) to have Flight Manuals amended with nose-wheel-steering procedures. Pilots must check steering before each takeoff and keep steering OFF for takeoff and landing (re-enabled only after landing taxi speed); use for takeoff/landing is prohibited. Issued after steering malfunctions and coordinated with FAA AD 93-08-09; compliance was required by 31 August 1993."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-66-nose-wheel-steering-system","history":"/api/acts/ad-swsa226-66-nose-wheel-steering-system/history","analysis":"/api/acts/ad-swsa226-66-nose-wheel-steering-system/analysis","conflicts":"/api/acts/ad-swsa226-66-nose-wheel-steering-system/conflicts","importantCases":"/api/acts/ad-swsa226-66-nose-wheel-steering-system/important-cases","documents":"/api/acts/ad-swsa226-66-nose-wheel-steering-system/documents"}}