{"id":"F2007L04522","name":"AD/B747/366 - Fuel Pump Housing to Wing Structure Electrical Bonding","slug":"ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70994,"registerId":"commonwealth-F2007L04522-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/366 | Fuel Pump Housing to WingStructure Electrical Bonding | 13/2007 |\n| ----------- | ----------------------------------------------------- | ------- |\n\n| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SR, and 747SP series aircraft.                                                                                                                                                                                                                                                                                                                                                   |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2007-21-13Amdt 39-15231.Note: Boeing Service Bulletin 747-28-2259 original issue, Revision 1, andRevision 2, or later FAA approved revision, refers.                                                                                                                                                                                                                                                 |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of20 December 2007.                                                                                                                                                                                                                                                                                                                                                                         |\n|                | This Airworthiness Directive becomes effective on 20 December 2007.                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | The FAA requires reworking the electrical bonding between the aircraft structure and the pump housing of certain fuel override/jettison pumps, and also requires related investigative actions and corrective actions if necessary. Insufficient electrical bonding could result in potential ignition sources inside the fuel tanks, which, in combination with flammable fuel vapours, could result in a fuel tank explosion and consequent loss of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 November 2007","sortOrder":0},{"sectionNumber":"AD/B747/366","sectionType":"part","heading":"AD/B747/366","content":"## AD/B747/366","sortOrder":1},{"sectionNumber":"Fuel Pump Housing to WingStructure Elect","sectionType":"part","heading":"Fuel Pump Housing to WingStructure Electrical Bonding","content":"## Fuel Pump Housing to Wing  \nStructure Electrical Bonding","sortOrder":2},{"sectionNumber":"13/2007","sectionType":"part","heading":"13/2007","content":"## 13/2007","sortOrder":3}],"analysis":{"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 standard Airworthiness Directive with a narrow, specific safety purpose. The scope remains tightly focused on the electrical bonding issue for the specified Boeing 747 fuel pump housings, which aligns with the original intent of addressing the identified ignition source hazard."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined term implicitly referenced (electrical bonding, explained in context)","No nested conditional logic or exceptions","Single cross-reference to FAA AD and Boeing Service Bulletin (external documents, not internal cross-referencing)","Straightforward applicability table with clear aircraft model list","Simple compliance date structure with no phased or conditional timelines"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of specified Boeing 747 models to inspect and, if needed, repair the electrical bonding between wing structure and fuel pump housings to eliminate spark/ignition risk in fuel tanks. It implements FAA AD 2007‑21‑13 and Boeing Service Bulletin 747‑28‑2259; compliance is required by 20 December 2007 to mitigate explosion risk from fuel vapours."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive adopts the FAA AD's technical requirements for fuel pump housing-to-wing electrical bonding and applies them to the listed Boeing 747 models. The instrument does not expand or narrow the listed applicability in the text supplied; it implements the FAA-mandated inspections, rework and corrective actions with the stated compliance date (Applicability; Requirement; Compliance)."},"complexity_factors":["Cross-reference to foreign instrument: adopts technical requirements of FAA AD 2007-21-13Amdt 39-15231 rather than reproducing full technical steps (Requirement) — adds dependency on an external document.","Dependence on manufacturer service bulletin revisions (Boeing Service Bulletin 747-28-2259, original, Revision 1, Revision 2, or later FAA‑approved revision) for precise procedures (Requirement).","Technical and specialised work: electrical bonding rework, investigative actions and possible corrective repairs require specialist maintenance facilities and certification (Requirement / Background).","Wide applicability list across many 747 variants increases number of affected operators and fleet planning complexity (Applicability).","Compliance timing and administrative effectivity note (revised effective date 20 December 2007) creates a fixed deadline for operators to schedule work (Compliance).","Uncertainty over scope of \"related investigative actions and corrective actions if necessary\" creates residual judgment and potential follow-on work for operators and maintenance organisations (Requirement / Background).","Regulatory adoption by CASA (Delegate signature) imports FAA safety rationale but leaves Australian operators responsible for bearing costs and arranging compliance (Background / Requirement)."],"plain_english_summary":"Requires operators of the listed Boeing 747 models to rework the electrical bonding between certain fuel pump housings and the wing structure, and to perform related inspections and corrective actions, following the technical steps in FAA AD 2007-21-13 and the referenced Boeing service bulletin. This addresses the risk that poor bonding could create ignition sources inside fuel tanks; operators must complete the work by the compliance date (effective 20 December 2007)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding","history":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding/history","analysis":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding/analysis","conflicts":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding/conflicts","importantCases":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding/important-cases","documents":"/api/acts/ad-b747-366-fuel-pump-housing-to-wing-structure-electrical-bonding/documents"}}