{"id":"F2006B01958","name":"AD/A320/7 - Standby Generator Control Unit (GCU)","slug":"ad-a320-7-standby-generator-control-unit-gcu","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41180,"registerId":"commonwealth-F2006B01958-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/7 - Standby Generator Control Unit (GCU)","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 5/1990,Aircraft above 5700 kg,Airbus Industrie A319, A320 and A321 Series Aeroplanes,Standby Generator Control Unit (GCU),7\ntitle: Airworthiness Directive - AD/A320/7 - Standby Generator Control Unit (GCU)\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)  Airbus Industrie A319, A320 and A321 Series Aeroplanes\n\n \n\nAD/A320/7 Standby Generator Control Unit (GCU) 5/90\n\nApplicability: All A320-111, A320-211 and A320-231 aircraft.\n\n \n\nRequirement: Action in accordance with Airbus Industrie Service Bulletins A320-24-1022 (mod 21052) and A320-24-1035 (mod 21736).\n\n \n\nNote: DGAC AD 89-198-004(B) refers.\n\n \n\nCompliance: Prior to 17 December 1990.\n\n \n\nBackground: Airbus Industrie have advised that the modifications contained in the referenced Service Bulletins are necessary to improve the lightning protection of the GCU in order to prevent malfunction.\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":1749},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting only the lightning protection modification for the Standby Generator Control Unit in specific early-model A320 aircraft. It has not expanded to cover additional aircraft systems or models beyond those originally specified."},"complexity_factors":["Single, unambiguous compliance requirement with no conditional exceptions","Relies entirely on external technical documents (Airbus Service Bulletins) for implementation specifications","No defined terms or interpretation sections","Straightforward applicability criteria based on specific aircraft model numbers"],"plain_english_summary":"This airworthiness directive requires Australian operators of specific Airbus A320 aircraft models (A320-111, A320-211, and A320-231) to modify the **Standby Generator Control Unit (GCU)** to improve its protection against lightning strikes.\n\n**What must be done:**\n- Aircraft operators must carry out technical modifications specified in two Airbus Service Bulletins (A320-24-1022 and A320-24-1035).\n- These bulletins provide the exact engineering changes needed to prevent GCU malfunction during lightning events.\n\n**Who is affected:**\n- Airlines and operators flying the specified A320 variants in Australian airspace.\n\n**Why this matters:**\n- The GCU manages the standby electrical generator. Without these modifications, a lightning strike could cause the unit to fail, potentially compromising the aircraft's electrical systems and safety.\n\n**Compliance deadline:**\n- The modifications had to be completed before 17 December 1990."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu","history":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu/history","analysis":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu/analysis","conflicts":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu/conflicts","importantCases":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu/important-cases","documents":"/api/acts/ad-a320-7-standby-generator-control-unit-gcu/documents"}}