{"id":"F2005L03588","name":"AD/DO 328/1 - Fuel Tank Safety Requirements","slug":"ad-do-328-1-fuel-tank-safety-requirements","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39189,"registerId":"commonwealth-F2005L03588-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 328 Series Aeroplanes","sectionType":"division","heading":"Dornier 328 Series Aeroplanes","content":"### Dornier 328 Series Aeroplanes\n\n| AD/DO 328/1 | Fuel Tank Safety Requirements | 13/2005 |\n| ----------- | ----------------------------- | ------- |\n\n| Applicability: | Model 328-100 series aeroplanes.                                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | If not previously accomplished, carry out the following actions in accordance with AvCraft Aerospace GmbH Dornier 328 Service Bulletin SB-328-00-445 dated23 August 2004:                                                                                                                                                                                                                           |\n|                | a. Modification of the electrical wiring of LH and RH fuel pump.                                                                                                                                                                                                                                                                                                                                    |\n|                | b. Thermal insulation of Cross Bleed Valve, Flow Control and Shut Off Valves bodies and ECS heat exchanger and temperature control valve body.                                                                                                                                                                                                                                                      |\n|                | c. Installation of markings at fuel wiring harness.                                                                                                                                                                                                                                                                                                                                                 |\n|                | d. Amendment of Airworthiness Limitations Document (ALD).                                                                                                                                                                                                                                                                                                                                           |\n|                | Note: LBA AD D-2005-001 (EASA Approval 2005-910) refers.                                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | Before 31 July 2006.                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 22 December 2005.                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | This Directive requires product improvement to meet the fuel tank safety requirements according to United States Special Federal Aviation Regulation (SFAR) 88 and European Joint Aviation Authorities Interim Policy INT/POL/25/12. The product improvements are designed to decrease the likelihood of ignition sources within the fuel tank and the possibility of an in-tank fire or explosion. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n11 November 2005","sortOrder":0},{"sectionNumber":"AD/DO 328/1","sectionType":"part","heading":"AD/DO 328/1","content":"## AD/DO 328/1","sortOrder":1},{"sectionNumber":"Fuel Tank Safety Requirements","sectionType":"part","heading":"Fuel Tank Safety Requirements","content":"## Fuel Tank Safety Requirements","sortOrder":2},{"sectionNumber":"13/2005","sectionType":"part","heading":"13/2005","content":"## 13/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive stays within the original safety-improvement purpose: to address fuel-tank ignition risks identified under SFAR 88 and related European guidance. It mandates specified modifications and an ALD amendment to meet those safety standards; it does not broaden regulatory scope beyond those fuel tank safety measures."},"complexity_factors":["Single-model applicability (Model 328-100) reduces breadth of coverage","Four discrete required actions (a–d) referenced to a single manufacturer service bulletin","Cross-reference to an external service bulletin (SB-328-00-445) — requires reading an external technical document","Reference to another regulator's AD (LBA D-2005-001 / EASA approval) adds one level of cross-jurisdictional linkage","Clear compliance deadline (before 31 July 2006) and effective date (22 December 2005) — few conditional exceptions","Limited number of defined terms and no nested exceptions or complex conditional logic"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It is an Airworthiness Directive (safety order) that applies to Dornier 328-100 series aeroplanes.\n- It requires operators/owners to carry out specific modifications and documentation changes exactly as described in AvCraft Aerospace GmbH Service Bulletin SB-328-00-445 (dated 23 August 2004). The mandated actions are:\n  - (a) Modify the electrical wiring for the left-hand and right-hand fuel pumps.\n  - (b) Fit thermal insulation to the bodies of the cross-bleed valve, flow-control and shut-off valves, and to the environmental control system (ECS) heat exchanger and temperature control valve body.\n  - (c) Install markings on the fuel wiring harness.\n  - (d) Amend the Airworthiness Limitations Document (ALD) (this typically adds or changes required inspection/maintenance tasks and intervals).\n- The directive cites and aligns with a related German LBA AD (D-2005-001) and EASA approval reference. It became effective on 22 December 2005 and operators had to comply by 31 July 2006.\n\n**Who is affected**\n\n- Primary: Owners and operators of Dornier 328-100 series aeroplanes (the aircraft must be modified before the compliance date).\n- Secondary: Maintenance organisations, approved MROs (maintenance, repair and overhaul providers), parts suppliers and engineers who will do the work or supply materials.\n- The regulator (Civil Aviation Safety Authority via its delegate) enforces compliance and references the AvCraft service bulletin as the method of compliance.\n\n**Why it matters (stated purpose and mechanical effect)**\n\n- The stated purpose is to reduce the likelihood of ignition sources inside the fuel tank and thereby reduce the risk of an in-tank fire or explosion. The directive implements changes intended to address fuel-tank ignition risks identified under the U.S. SFAR 88 regime and a European interim policy (JAA INT/POL/25/12).\n- Mechanically, the measures: change wiring layouts (reducing chafing/short/crossover risk), add thermal insulation near valve and heat-exchanger bodies (reducing heat transfer that could ignite fuel vapour), add identification markings (helps maintenance avoid mistakes that could create ignition sources), and update the ALD (adds ongoing inspections or limitations to keep the mitigations effective).\n\n**Costs, incentives and trade-offs (practical effects)**\n\n- Who pays: aircraft owners/operators pay for parts, labour and the downtime required to perform the modifications and to update the ALD.\n- Compliance burden: work must be done in accordance with the specified service bulletin; aircraft will be unavailable for operations while modified. The ALD amendment typically creates ongoing inspection and maintenance obligations that increase recurrent costs.\n- Implementation risk: the safety benefit depends on correct installation per the service bulletin. Incorrect modification could leave hazards or create new maintenance burdens. The regulator enforces compliance but the directive relies on the service bulletin for technical detail.\n- Effects on private enterprise and markets: operators face upfront and recurring costs, creating demand for approved maintenance providers and parts suppliers. If the supply of qualified MROs or specific parts is limited, operators could face higher prices or scheduling delays. Independent MROs may compete to supply the work where they are approved to use the service bulletin; the directive itself does not restrict who may perform the work so long as regulatory approvals and standards are met.\n\n**Implementation details and regulatory interactions**\n\n- The directive requires compliance with a manufacturer service bulletin (SB-328-00-445), so technical conformity is achieved by following that document.\n- It cross-references a German LBA airworthiness directive and an EASA approval, indicating coordinated international regulatory oversight.\n\n**Concentrated benefits and diffuse costs; capture risks**\n\n- Benefits (reduced ignition risk) accrue to passengers, crew and the aircraft owner/operator in terms of safety; they are safety gains rather than direct financial gains. Costs are concentrated on the aircraft owners/operators who must pay for the work. The instrument does not itself create exclusive supplier rights, but market effects (price or access issues) depend on how many approved suppliers or spare parts are available in practice.\n\n**Net mechanical effect in one sentence**\n\n- Owners/operators of Dornier 328-100 aircraft must implement wiring, insulation, marking and documentation changes set out in AvCraft SB-328-00-445 by 31 July 2006 to reduce the risk of fuel-tank ignition; the regulator enforces this by issuing the directive."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive implementing specific airworthiness requirements. It has not expanded beyond its original purpose of mandating fuel tank safety modifications for a particular aircraft type."},"complexity_factors":["Single, specific aircraft model (Dornier 328-100) with clear applicability","Four discrete, itemised requirements (a-d) with no conditional logic or exceptions","Single compliance deadline with no phased or alternative compliance options","No defined terms section — relies on external technical documents (Service Bulletin SB-328-00-445)","Minimal cross-referencing (only to German LBA AD and EASA approval for context)","Straightforward background explanation referencing established international standards"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety modifications to Dornier 328-100 fuel systems — including changes to fuel-system wiring, added thermal insulation near fuel components, warning markings, and updates to mandatory maintenance limits — to eliminate potential ignition sources.\n\nIt affects Australian-registered owners/operators and implements international SFAR 88/JAA requirements to prevent fuel-tank explosions (e.g., TWA 800). Work must be completed by 31 July 2006; AD effective 22 Dec 2005."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements","history":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements/history","analysis":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements/analysis","conflicts":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements/conflicts","importantCases":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements/important-cases","documents":"/api/acts/ad-do-328-1-fuel-tank-safety-requirements/documents"}}