{"id":"F2006B07188","name":"AD/SWSA226/48 - Swivel Reading Lights - Inspection/Modification","slug":"ad-swsa226-48-swivel-reading-lights-inspection-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114960,"registerId":"commonwealth-F2006B07188-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/48 - Swivel Reading Lights - Inspection/Modification","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/SWSA226/48 Swivel Reading Lights - Inspection/Modification 3/84\n\nApplicability: Merlin III model SA226-T S/No. T249 through T291 except T276. Merlin IIIB model SA226-T(B) S/No. T(b) 276, T(B) 292 through T(B) 417. Merlin IV model SA226- AT S/No. AT025, AT027 through AT074.\n\n \n\nDocument: Fairchild Aircraft Corporation SB 33-003 revised 5th October 1983. Compliance: Prior to 31 December 1984.\n\nBackground:  A potential short circuit between the overhead air hoses and the electrical terminals of the reading lights currently exists. If a low resistance path is established and the increase in current is insufficient to trip the circuit breaker, a fire may result.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2196},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly scoped to its original purpose: addressing a specific fire hazard in the swivel reading lights of identified aircraft models. There is no evidence of scope expansion beyond the original safety issue and specified serial numbers."},"complexity_factors":["Single-page document with no sections or subsections","Only three specific aircraft models affected with explicit serial number ranges","One clear compliance action (inspect/modify per Service Bulletin 33-003)","No complex conditional logic, exceptions, or cross-references to other legislation","Plain language background explanation included"],"plain_english_summary":"This **Airworthiness Directive** (a mandatory safety order from the aviation regulator) requires owners of specific Fairchild Swearingen Merlin aircraft to fix a fire hazard in the cockpit or cabin reading lights.\n\n**The problem:** The swivel reading lights have electrical terminals that could touch the overhead air hoses. If they short-circuit and the safety switch (circuit breaker) fails to trip, the heat could start a fire.\n\n**Who is affected:** Owners and operators of Merlin III, IIIB, and IV aircraft with the specific serial numbers listed (including ranges T249–T291 and others).\n\n**What must be done:** Inspect and modify the lights following the manufacturer's technical instructions (Fairchild Service Bulletin 33-003) before 31 December 1984.\n\n**Why it matters:** This prevents potential in-flight fires caused by electrical faults in the cabin lighting system."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification","history":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification/history","analysis":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification/analysis","conflicts":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification/conflicts","importantCases":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification/important-cases","documents":"/api/acts/ad-swsa226-48-swivel-reading-lights-inspection-modification/documents"}}