{"id":"F2006B01874","name":"AD/A320/127 Amdt 2 - Fuel Quantity Indication System Wiring","slug":"ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41070,"registerId":"commonwealth-F2006B01874-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/127 Amdt 2 - Fuel Quantity Indication System Wiring","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/A320/127 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/127\n\nAmdt 2\n\n  \nFuel Quantity Indication System Wiring 10/2004\n\nApplicability: Model A319, A320, and A321 series aeroplanes, except those on which Airbus Industrie Modification 28289 has been embodied during production or Airbus Industrie Service Bulletin (SB) A320-92-1007 Revision 8 has been incorporated whilst in service.\n\nRequirement: Install additional protective conduits and new supports to ensure physical route segregation between the low voltage wire bundles of the fuel quantity indicating system (FQIS) and the high voltage wire bundles of the ground power control unit (GPCU) in accordance with Airbus Service Bulletin A320-92-1007 Revision 8 or later revision approved by the DGAC.\n\nA319 and A320 aeroplanes that have incorporated SB A320-92-1007 at its original issue, or Revisions 1, 2, 3, 4, 5, 6 or 7, prior to the effective date of this Amendment, comply with the requirements of this Directive.\n\nA321 aeroplanes that have incorporated SB A320-92-1007 at its original issue, or Revisions 6, prior to the effective date of this Amendment, comply with the requirements of this Directive.\n\nNote: DGAC AD F-2004-044 R1 (EASA approval 2004-8065) and AD F-2004-129\n\n(EASA approval 2004-8058) refer.\n\nCompliance: Before 5 August 2005.\n\nThis Amendment becomes effective on 30 September 2004.\n\nBackground: The original issue of this Directive required modification of wiring route to improve the segregation between the low voltage wire bundles of the FQIS and the high voltage wire bundles of the GPCU in accordance with SB A320-92-1007, original issue or Revisions 1,2 or 3. These actions were intended to prevent injection of 115 volt alternating current (VAC) into 28 volt direct current (VDC) wire bundles, which could damage fuel tank equipment.\n\nAmendment 1 followed the issue of a revised DGAC Directive and contained minor amendments giving credit for incorporation of later issues of service bulletins.\n\nAmendment 2 follows the issue of a revised DGAC Directive and contains clarification of credit given for incorporation of earlier service bulletins.\n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/127 Amdt 2 (continued)\n\nAmendment 1 of this Airworthiness Directive became effective on 5 August 2004.\n\nThe original issue of this Airworthiness Directive became effective on 4 October 2001.\n\n![](image.002.jpeg)  \n\nGary J Carr\n\nDelegate of the Civil Aviation Safety Authority 13 August 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Amendment 2 does not change the substantive population of affected aircraft or the core mandate to install segregation conduits; it clarifies which earlier Service Bulletin revisions give credit and follows a revised DGAC directive. The AD revokes the prior amendment but retains the original safety requirement while adjusting crediting/clarification language (opening paragraph; Requirement; Background)."},"complexity_factors":["Model-specific applicability with explicit exemptions for aircraft that already have Modification 28289 or SB A320-92-1007 incorporated (Applicability).","Requirement ties compliance to a specific Airbus Service Bulletin revision (Rev 8) but allows later DGAC-approved revisions, creating dependence on foreign regulator approvals (Requirement).","Credit/comply language lists multiple earlier SB revisions that satisfy the AD for some aircraft types, requiring operators to check historical SB incorporation (Requirement).","Interplay with prior ADs and revocation of the earlier amendment requires record checks and confirms this AD replaces AD/A320/127 Amdt 1 (opening paragraph; Background).","Defined compliance deadline imposes a hard scheduling constraint on operators (Compliance: Before 5 August 2005).","Technical work specified (install conduits and supports to ensure physical segregation) creates a measurable maintenance task, parts need and aircraft downtime (Requirement; Background).","Cross-references to DGAC and EASA approvals (Note, Requirement) add regulatory coordination complexity when seeking acceptable later SB revisions."],"plain_english_summary":"This directive requires operators of Airbus A319, A320 and A321 aircraft (unless a specific production modification or Service Bulletin revision is already embodied) to install protective conduits and supports so fuel-quantity low-voltage wiring is physically separated from high-voltage ground-power wiring, following Airbus Service Bulletin A320-92-1007 (Rev 8 or later DGAC‑approved). Operators must complete the work by 5 August 2005 and will bear the cost, scheduling and downtime to prevent possible 115 VAC injection into 28 VDC fuel-tank wiring."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The legislation maintains its original narrow scope: mandating specific wiring segregation modifications for Airbus A320 family aircraft. Amendment 2 is purely clarificatory, adjusting credit rules for previously completed work without expanding the aircraft types covered or the nature of the safety intervention."},"complexity_factors":["Multiple applicability exceptions (factory modification vs in-service bulletin)","Different compliance credit rules for A319/A320 versus A321 aircraft","Cross-references to French aviation authority (DGAC) directives and European approvals","Version control complexity (tracking original issue plus Revisions 1-8 of service bulletin)","Nested conditional logic for determining compliance based on prior work history"],"plain_english_summary":"This safety order requires operators of Airbus A319/A320/A321 aircraft to add protective tubing and supports to separate low-voltage FQIS fuel-level wiring from high-voltage GPCU ground-power wiring to prevent 115V leakage into fuel-system wiring and the resulting fire/explosion risk. \n\nIt applies unless the aircraft has Mod 28289 or the repair per Service Bulletin A320-92-1007 Rev 8; partial credit is given for earlier repairs. Work due by 5 August 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring","history":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring/history","analysis":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring/analysis","conflicts":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring/conflicts","importantCases":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring/important-cases","documents":"/api/acts/ad-a320-127-amdt-2-fuel-quantity-indication-system-wiring/documents"}}