{"id":"F2006B10388","name":"AD/HS 125/110 - Passenger Compartment Fluorescent Lighting","slug":"ad-hs-125-110-passenger-compartment-fluorescent-lighting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116041,"registerId":"commonwealth-F2006B10388-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/110 - Passenger Compartment Fluorescent Lighting","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)  \nBritish Aerospace BAe 125 Series Aeroplanes\n\nAD/HS 125/110 Passenger Compartment Fluorescent Lighting 9/90\n\nApplicability: All BAe 125 aircraft as detailed in the Requirement Document. Requirement: Action in accordance with BAe Service Bulletin 33-43.\n\nNote: Compliance with this SB has been classified Mandatory by the UK CAA.\n\nCompliance: Prior to 6 October 1990.\n\nBackground: British Aerospace have advised that the use of fluorescent lighting components manufactured by Aerospace Lighting Corporation (ALC) are used as original fit equipment on aircraft completed at Chester. Similar components manufactured by other companies are available bearing the same part number, however the use of these components with original fit components can lead to electrical arcing at the lamp connectors, leading to overheating and possible fire hazard.\n\nAD/ELECT/56 details action to be taken in respect of cabin fluorescent lighting system components manufactured by S.E.L.A. Laboratoire Abadie, and provides background detail which is also relevant to this AD.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive with a narrow, specific purpose: addressing a known fire hazard in cabin lighting for one aircraft type. It has not expanded beyond its original safety intent."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (the Service Bulletin)","No nested conditional logic or exceptions","Single straightforward requirement with clear deadline","Minimal cross-referencing (only one reference to a related directive for background context)","Simple applicability test (all aircraft in the BAe 125 series)"],"plain_english_summary":"Australia’s Civil Aviation Safety Authority requires all operators of BAe 125 series business jets to comply with manufacturer Service Bulletin 33-43 (by 6 October 1990) to eliminate a fire risk from electrical arcing when fluorescent lamp parts from different makers are mixed. The measure, mirrored as mandatory by the UK CAA, prevents overheating and potential passenger‑cabin fires by ensuring compatible lighting components."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change indicated in the text: the AD applies to all BAe 125 aircraft as set out in the Requirement Document and mandates action in accordance with BAe Service Bulletin 33‑43 to be completed prior to 6 October 1990. The instrument does not expand or narrow that applicability within the document itself."},"complexity_factors":["Technical safety focus: electrical arcing/fire risk in cabin fluorescent lighting (background specifies overheating and possible fire hazard).","Cross-reference to external mandatory material: action required only by following BAe Service Bulletin 33‑43.","Applicability tied to an external Requirement Document (\"All BAe 125 aircraft as detailed in the Requirement Document\"), adding reliance on another document for precise scope.","Mandatory compliance deadline (prior to 6 October 1990) creates a hard operational timeline for operators.","Reference to related AD (AD/ELECT/56) for additional background, requiring coordination across directives.","Practical compliance burden rests on aircraft operators to inspect/replace components and ensure wiring/connector compatibility."],"plain_english_summary":"This Airworthiness Directive requires operators of BAe 125 series aircraft to carry out the actions set out in BAe Service Bulletin 33‑43 (as detailed in the Requirement Document) before 6 October 1990. It addresses passenger‑compartment fluorescent lighting where original Aerospace Lighting Corporation (ALC) parts mixed with look‑alike parts can cause connector arcing, overheating and possible fire; the UK CAA has classified compliance with the service bulletin as mandatory."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting","history":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting/history","analysis":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting/analysis","conflicts":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting/conflicts","importantCases":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting/important-cases","documents":"/api/acts/ad-hs-125-110-passenger-compartment-fluorescent-lighting/documents"}}