{"id":"F2006B10416","name":"AD/HS 125/136 - Emergency Contactor Not Closed Indicator","slug":"ad-hs-125-136-emergency-contactor-not-closed-indicator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116095,"registerId":"commonwealth-F2006B10416-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/136 - Emergency Contactor Not Closed Indicator","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)  British Aerospace BAe 125 Series Aeroplanes\n\n \n\nAD/HS 125/136 Emergency Contactor Not Closed Indicator 4/93\n\nApplicability: Series 1000A and 1000B aircraft.\n\n \n\nRequirement: Incorporate Modification Number 253645A in accordance with the Accomplishment Instructions of Corporate Jets Limited Service Bulletin SB.31-44-3645A dated 15 January 1993.\n\n \n\nNote: This Service Bulletin has been classified as Mandatory by the CAA(UK).\n\n \n\nCompliance: Prior to 30 May 1993.\n\n \n\nBackground: This Directive has been issued to meet a flight deck indication requirement and requires the changing of the ‘EMERG CONTCTRS’ annunciator screen from white to amber. Dispatch of an aircraft with the ‘EMERG CONTCTRS’ annunciator illuminated is prohibited.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly scoped to its original purpose: addressing a specific flight deck indication deficiency in two aircraft models. There is no evidence of scope creep; it does not expand to other aircraft types, systems, or operational requirements beyond the original technical modification."},"complexity_factors":["Single, specific aircraft type and model series (BAe 125 Series 1000A and 1000B only)","One discrete technical requirement (change annunciator colour from white to amber)","No defined terms section or interpretive provisions","No conditional logic or nested exceptions","Single cross-reference to an external technical document (Service Bulletin SB.31-44-3645A)","Fixed, non-negotiable compliance deadline","Extremely short document (approximately 150 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain British Aerospace BAe 125 business jets (specifically the 1000A and 1000B models) to install a safety modification. This involves changing the colour of a cockpit warning light from white to amber.\n\n**Why it matters:**\nThe warning light — labelled 'EMERG CONTCTRS' (Emergency Contactors) — alerts pilots when emergency electrical contactors haven't closed properly. The colour change from white to amber makes this warning more noticeable and consistent with standard aviation warning colours (amber/yellow typically indicates a caution, while white is less urgent). \n\n**The practical effect:**\nOnce this change is made, if that amber light comes on, the aircraft cannot legally take off until the problem is fixed. This prevents flights with potentially serious electrical system faults.\n\n**Who must comply:**\nAnyone operating the affected aircraft models in Australia had to complete this modification before 30 May 1993.\n\n**Where it comes from:**\nAustralia adopted this requirement from the UK Civil Aviation Authority, which had already classified the manufacturer's service bulletin as mandatory."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive does not expand or alter the population it affects; it mandates a single, specific modification for the identified aircraft series to meet a flight‑deck indication requirement and sets a compliance deadline and an operational prohibition. No broader scope change from the instrument text is evident."},"complexity_factors":["Clear applicability limited to BAe 125 Series 1000A and 1000B (Applicability)","Specific modification mandated by serial number and an identified service bulletin (Requirement: Mod No. 253645A; SB.31-44-3645A dated 15 Jan 1993)","Fixed compliance deadline (Compliance: prior to 30 May 1993)","Operational prohibition tied to the indicator state (Background: dispatch prohibited if annunciator illuminated)","Mandatory classification by another regulator noted (Note: CAA(UK) classified the bulletin as Mandatory)","Technical scope is narrow and specific (annunciator colour change), reducing technical ambiguity but creating scheduling and cost burdens for operators"],"plain_english_summary":"This airworthiness directive requires operators of British Aerospace BAe 125 Series 1000A and 1000B aircraft to install Modification No. 253645A (per Corporate Jets Service Bulletin SB.31-44-3645A dated 15 Jan 1993) to change the ‘EMERG CONTCTRS’ annunciator from white to amber. The change must be done by 30 May 1993; dispatch with that annunciator illuminated is prohibited. Operators bear the cost and scheduling burden; the regulator enforces the mandatory compliance noted by the UK CAA."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator","history":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator/history","analysis":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator/analysis","conflicts":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator/conflicts","importantCases":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator/important-cases","documents":"/api/acts/ad-hs-125-136-emergency-contactor-not-closed-indicator/documents"}}