{"id":"F2006B01900","name":"AD/A320/156 - Hydraulic Bay Maintenance Lights","slug":"ad-a320-156-hydraulic-bay-maintenance-lights","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41109,"registerId":"commonwealth-F2006B01900-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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","sortOrder":0},{"sectionNumber":"AD/A320/156 Hydraulic Bay Maintenance Li","sectionType":"part","heading":"AD/A320/156 Hydraulic Bay Maintenance Lights 8/2004","content":"# AD/A320/156 Hydraulic Bay Maintenance Lights 8/2004\n\nApplicability: Model A318, A319, A320 and A321 series aeroplanes, all serial numbers, except those on which Airbus Industrie Modification 33518 has been embodied during production or Airbus Industrie Service Bulletin (SB) A320-92-1032 dated 8 March 2004 has been incorporated whilst in service.\n\nRequirement: Remove the maintenance light with part number (P/N) 2LA002606-01 from the hydraulics bay and disconnect the electrical wiring in accordance with SB A320-92- 1032.\n\nNote: DGAC AD F-2004-073 refers.\n\nCompliance: Before 31 December 2005.\n\nThis Airworthiness Directive becomes effective on 5 August 2004.\n\nBackground: Airbus Industrie has determined during a explosion risk design review that a hazard exists in the hydraulic bay area (blue and yellow hydraulic system) and that maintenance lights 9LL and 10LL (P/N 2LA002606-01) should be removed to protect the bay from fuel vapour ignition.\n\n![](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 23 June 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No alteration to scope beyond the instrument's stated applicability and exclusions. The AD requires removal of a specified maintenance light on listed Airbus models unless the mod or service bulletin has already been implemented, and sets a compliance deadline; it enforces Airbus' hazard finding without expanding applicability or imposing additional, unrelated obligations."},"complexity_factors":["Applicability limited to specific Airbus models but excludes aeroplanes with Modification 33518 or SB A320‑92‑1032 already embodied (requires fleet record checks).","Mandates a specific part removal (P/N 2LA002606‑01) and electrical disconnection, but prescribes Airbus Service Bulletin A320‑92‑1032 as the procedural reference (external document dependency).","Fixed compliance deadline (31 Dec 2005) imposes scheduling and operational planning for affected operators.","Requires physical maintenance, parts verification and documentation of compliance (maintenance logistics and record‑keeping burden).","Cross-reference to foreign authority AD (DGAC AD F‑2004‑073) increases regulatory traceability considerations."],"plain_english_summary":"Requires operators of Airbus A318–A321 aeroplanes (unless Airbus Mod 33518 or Service Bulletin A320‑92‑1032 has already been applied) to remove maintenance light P/N 2LA002606‑01 from the hydraulic bay and disconnect its wiring, following Airbus SB A320‑92‑1032, by 31 December 2005. The stated purpose is to prevent fuel‑vapour ignition in the blue/yellow hydraulic bay. Aircraft operators bear the cost and operational disruption of the removal; the CASA delegate enforces the requirement and relies on the Service Bulletin for the method and records."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific identified hazard. The scope remains tightly focused on the original safety issue (explosion risk from maintenance lights in hydraulic bays) without expansion into broader operational or maintenance requirements."},"complexity_factors":["Single, specific mechanical action required (remove light, disconnect wiring)","Only one defined term of note (P/N = part number)","Clear applicability criteria with simple exceptions (two exemption conditions)","Single compliance deadline with no conditional timing","No nested cross-references to other legislation (only references a service bulletin and a French aviation directive for information)","Background section provides clear rationale without legal caveats"],"plain_english_summary":"This CASA safety order requires owners/operators of Airbus A318/A319/A320/A321 to remove part number 2LA002606-01 maintenance lights from the hydraulic bay and disconnect their wiring because Airbus found they could ignite fuel vapours, posing an explosion risk. Aircraft with factory Mod 33518 or SB A320-92-1032 installed are exempt. Work must be completed by 31 December 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights","history":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights/history","analysis":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights/analysis","conflicts":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights/conflicts","importantCases":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights/important-cases","documents":"/api/acts/ad-a320-156-hydraulic-bay-maintenance-lights/documents"}}