{"id":"F2006B01924","name":"AD/A320/34 - Braking System Electrical Relays","slug":"ad-a320-34-braking-system-electrical-relays","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41146,"registerId":"commonwealth-F2006B01924-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/34 - Braking System Electrical Relays","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 13/1993,Aircraft above 5700 kg,Airbus Industrie A319, A320 and A321 Series Aeroplanes,Braking System Electrical Relays,34\ntitle: Airworthiness Directive - AD/A320/34 - Braking System Electrical Relays\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/A320/34 Braking System Electrical Relays 13/93\n\nApplicability: All A320 series aeroplanes without Airbus Industrie modification 23611. Requirement:               Action in accordance with Airbus Industrie Service Bulletin A320-32-1115 dated\n\n16 June 1993.\n\n \n\nNote: DGAC AD 93-163-043(B) dated 29 September 1993 refers.\n\n \n\nCompliance: Prior to 30 September 1994.\n\n \n\nBackground: Airbus Industrie has received reports of Braking/Steering Control Unit (BSCU) failures being caused by voltage peaks on relays 24GG and 25GG. This Directive mandates the replacement of both relays with overvoltage protected relays, thus decreasing the probability of BSCU failure. The DGAC compliance date is extended by one calendar month.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive's scope is narrowly confined to A320 series aeroplanes lacking modification 23611 and mandates relay replacement per the Airbus Service Bulletin; the text does not broaden or alter the original targeted population or obligations."},"complexity_factors":["Narrow technical scope: applies only to A319/A320/A321 without Airbus mod 23611 (low legal breadth).","Single mandated action: replacement of two relays per a specified Service Bulletin (low procedural complexity).","Fixed compliance deadline creates scheduling pressure for operators and maintenance providers.","Dependency on manufacturer Service Bulletin for technical conformity and parts specification.","Inter-jurisdictional reference: notes DGAC AD and an extended compliance date (minor regulatory coordination).","Operational impacts: parts availability and aircraft downtime introduce practical complexity beyond legal text."],"plain_english_summary":"This Directive requires operators of Airbus A319/A320/A321 aeroplanes that have not received Airbus modification 23611 to replace two braking‑system relays (24GG and 25GG) with overvoltage‑protected units, following Airbus Service Bulletin A320‑32‑1115 (16 June 1993). The stated aim is to reduce Braking/Steering Control Unit (BSCU) failures caused by voltage peaks. Operators must complete the replacement by 30 September 1994 and therefore bear the parts, labour and scheduling costs of the mandated maintenance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific technical fault. It has not expanded beyond its original purpose of mandating a particular hardware modification to prevent BSCU failures."},"complexity_factors":["Single, specific technical requirement (relay replacement)","Only one defined applicability criterion (absence of modification 23611)","Single compliance deadline with no conditional extensions","No nested exceptions or conditional logic","Cross-reference to only one external document (Airbus Service Bulletin) and one related foreign directive (DGAC AD)","Extremely short document (under 200 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators of Airbus A319/A320/A321 aircraft without Airbus mod 23611 replace two braking-system relays with overvoltage-protected units per Airbus Service Bulletin A320‑32‑1115 (action due by 30 Sep 1994). It’s a compulsory safety fix to stop voltage spikes that can disable the Braking/Steering Control Unit, preventing brake/steering failures that could cause runway excursions, loss of control, or collisions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-34-braking-system-electrical-relays","history":"/api/acts/ad-a320-34-braking-system-electrical-relays/history","analysis":"/api/acts/ad-a320-34-braking-system-electrical-relays/analysis","conflicts":"/api/acts/ad-a320-34-braking-system-electrical-relays/conflicts","importantCases":"/api/acts/ad-a320-34-braking-system-electrical-relays/important-cases","documents":"/api/acts/ad-a320-34-braking-system-electrical-relays/documents"}}