{"id":"F2007L03990","name":"AD/B717/24 - Fuel Float Switches - In-Line Fuses","slug":"ad-b717-24-fuel-float-switches-in-line-fuses","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":160781,"registerId":"commonwealth-F2007L03990-current","compilationNumber":null,"startDate":"2026-04-04","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 717 Series Aeroplanes","sectionType":"division","heading":"Boeing 717 Series Aeroplanes","content":"### Boeing 717 Series Aeroplanes\n\n| AD/B717/24 | Fuel Float Switches - In-Line Fuses | 11/2007 |\n| ---------- | ----------------------------------- | ------- |\n\n| Applicability: | Model 717-200 aeroplanes, as identified in Boeing Service Bulletin (SB)717-28-0014, dated 20 March 2007.                                                                                                                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Install in-line fuel level float switch fuses and wire protection at the left, right and centre forward spars, in accordance with the Accomplishment Instructions of Boeing SB 717-28-0014.                                                                                                                                                                                                       |\n|                | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-17-11, are considered acceptable for compliance with the equivalent Requirements of this Directive.                                                                                                                               |\n|                | Note: FAA AD 2007-17-11 Amdt 39-15169 refers.                                                                                                                                                                                                                                                                                                                                                     |\n| Compliance:    | Within 60 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 25 October 2007.                                                                                                                                                                                                                                                                                                                                |\n| Background:    | This Directive results from a design review of the fuel tank systems conducted by the manufacturer. The Directive is issued to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs or maintenance actions, which, in combination with flammable fuel vapours, could result in fuel tank explosions and consequent loss of the aeroplane. |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n4 September 2007","sortOrder":0},{"sectionNumber":"AD/B717/24","sectionType":"part","heading":"AD/B717/24","content":"## AD/B717/24","sortOrder":1},{"sectionNumber":"Fuel Float Switches - In-Line Fuses","sectionType":"part","heading":"Fuel Float Switches - In-Line Fuses","content":"## Fuel Float Switches - In-Line Fuses","sortOrder":2},{"sectionNumber":"11/2007","sectionType":"part","heading":"11/2007","content":"## 11/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific identified safety risk in a particular aircraft model. The scope remains precisely focused on the fuel system ignition hazard identified in the manufacturer's design review, with no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, specific technical requirement (install fuses and wire protection)","Only 1 defined applicability criterion (specific Boeing model and service bulletin)","Simple compliance timeline (single deadline, no phased requirements)","Minimal cross-referencing (only references one Boeing SB and one FAA AD)","No nested exceptions or conditional logic — straightforward mandatory action","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This AD requires operators of Boeing 717‑200 aircraft to install in‑line fuses and wire protection on fuel tank float switches (per Boeing SB 717‑28‑0014) to eliminate electrical-ignition risk. It affects owners/operators covered by the March 2007 bulletin and must be done within 60 months of 25 Oct 2007. Compliance with later FAA‑approved revisions of the service bulletin is allowed."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope aligns with the Directive's stated purpose: to require installation of in-line fuses and wire protection on fuel float switches for the Boeing 717-200 aircraft identified in Boeing SB 717-28-0014, to address ignition-source risk identified in the manufacturer's fuel-tank design review (Applicability; Requirement; Background). No material expansion or narrowing of affected aircraft or remedial action is indicated in the text supplied."},"complexity_factors":["Technical installation across three spars and associated wiring protection increases onsite labour and parts coordination (Requirement).","Dependence on an external Boeing Service Bulletin for the exact work instructions creates a regulatory dependency (Requirement / Applicability).","Acceptance of later SB revisions only when approved by the FAA as an AMOC adds a procedural compliance step and potential administrative delay (Requirement).","A relatively long compliance window (60 months) shifts costs and planning into maintenance schedules but requires recordkeeping to demonstrate compliance timing (Compliance).","Applicability is limited to aeroplanes identified in the specified SB, requiring operators to verify serial-number applicability before action (Applicability).","Cross-reference to FAA AD 2007-17-11 and related notes means this Directive tracks foreign regulator action and relies on that alignment (Requirement / Note)."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 717-200 aeroplanes identified in Boeing Service Bulletin SB 717-28-0014 to install in-line fuses and wire protection on the left, right and centre forward spar fuel float switches. Compliance must be completed within 60 months; later SB revisions approved by the FAA as Alternate Methods of Compliance are acceptable. The measure aims to reduce the risk of ignition sources inside fuel tanks caused by latent failures, maintenance or alterations."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses","history":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses/history","analysis":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses/analysis","conflicts":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses/conflicts","importantCases":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses/important-cases","documents":"/api/acts/ad-b717-24-fuel-float-switches-in-line-fuses/documents"}}