{"id":"F2007L02378","name":"AD/SF340/102 - Fuel Quantity Indication System - Modification 3163","slug":"ad-sf340-102-fuel-quantity-indication-system-modification-3163","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67747,"registerId":"commonwealth-F2007L02378-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"SAAB SF340 Series Aeroplanes","sectionType":"division","heading":"SAAB SF340 Series Aeroplanes","content":"### SAAB SF340 Series Aeroplanes\n\n| AD/SF340/102 | Fuel Quantity IndicationSystem - Modification 3163 | 9/2007 |\n| ------------ | -------------------------------------------------- | ------ |\n\n| Applicability: | SF340A and 340B aeroplanes. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. If not previously accomplished, modify the fuel quantity indication system (FQIS) wiring by incorporating Modification 3163 in accordance with SAAB Service Bulletin SB-340-28-025 dated 26 February 2007 or later revision approved by the European Aviation Safety Agency (EASA). |\n| | 2. Perform an operational and functional test of the fuel measuring indication system in accordance with SB-340-28-025 dated 26 February 2007 or later revision approved by the EASA. |\n| | Note: EASA AD 2007-0169 refers. |\n| Compliance: | For Requirement 1 - Within 72 months after the effective date of this Directive. |\n| | For Requirement 2 - Before further flight, after accomplishing the Requirement 1 modifications. |\n| | This Airworthiness Directive becomes effective on 30 August 2007. |\n| Background: | Subsequent to accidents involving Fuel Tank System explosions in flight (Boeing 747-131 flight TWA800) and on the ground, the United States Federal Aviation Administration (FAA) published Special Federal Aviation Regulation 88 (SFAR 88) in June 2001.In their Letters referenced 04/00/02/07/01-L296 dated 4 March 2002 and 04/00/02/07/03-L024, dated 3 February 2003, the European Joint Aviation Authorities (JAA) recommended the application of a similar regulation to the European National Aviation Authorities (NAA).Under this regulation, all holders of type certificates for passenger transport aircraft with either a passenger capacity of 30 or more, or a payload capacity of 7,500 pounds (3402 kg) or more, which have received their certification since 1 January 1958, were required to conduct a design review against explosion risks. |\n\n| | This Directive requires the modification of the FQIS signal conditioner 28 VDC wiring to ensure separation and is a consequence of the design review. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n17 July 2007","sortOrder":0},{"sectionNumber":"AD/SF340/102","sectionType":"part","heading":"AD/SF340/102","content":"## AD/SF340/102","sortOrder":1},{"sectionNumber":"Fuel Quantity IndicationSystem - Modific","sectionType":"part","heading":"Fuel Quantity IndicationSystem - Modification 3163","content":"## Fuel Quantity Indication \nSystem - Modification 3163","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive applies to SF340A and SF340B aeroplanes and implements a wiring separation modification and testing regime identified by the design review. The instrument stays within that original safety-focused scope—there is no indication in the text of an expansion or narrowing of scope beyond requiring Modification 3163 per the referenced service bulletin."},"complexity_factors":["Technical work: aircraft wiring modification to FQIS signal conditioner (requires specialist maintenance skills and shop time).","External dependence: mandatory incorporation of a SAAB Service Bulletin only if EASA-approved or later revision (cross-reference to EASA approvals).","Two-step compliance: physical modification (within 72 months) plus mandatory functional/operational test prior to further flight.","Regulatory provenance: follows broader SFAR 88-style design-review obligations and references EASA/FAA materials (background regulatory linkage).","Limited applicability: applies only to SAAB SF340A and SF340B types, narrowing the population but concentrating costs on their operators."],"plain_english_summary":"Requires owners/operators of SAAB SF340A and SF340B aeroplanes to modify the fuel quantity indication system wiring by installing Modification 3163 per SAAB Service Bulletin SB-340-28-025 (EASA-approved) and to carry out an operational/functional test. The stated purpose is to reduce fuel tank explosion risk following regulator design reviews. Owners/operators pay for and schedule the wiring change within 72 months and must complete testing before further flight (Requirements & Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive implementing international fuel tank safety requirements. The scope remains tightly focused on the specific wiring modification required for the SAAB SF340 series as mandated by the post-TWA 800 safety review regime. No scope creep is evident."},"complexity_factors":["Very short document (approximately 300 words of substantive content)","Only 2 operational requirements with clear sequential logic","Single defined technical term (FQIS - Fuel Quantity Indication System) explained in context","No nested exceptions or conditional sub-clauses","Simple compliance structure: one deadline for modification, one deadline for testing","Cross-reference to only one external document (SAAB Service Bulletin SB-340-28-025) and one related EASA directive","Straightforward applicability (two specific aircraft models only)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators and maintenance organisations of SAAB SF340A/B aircraft to modify the Fuel Quantity Indication System (Modification 3163) to re-route 28‑V wiring so wiring separation reduces risk of electrical ignition near fuel tanks. \n\nIssued after lessons from TWA Flight 800, the change must be completed within 72 months of 30 August 2007 and the system tested before the aircraft’s next flight."},"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-sf340-102-fuel-quantity-indication-system-modification-3163","history":"/api/acts/ad-sf340-102-fuel-quantity-indication-system-modification-3163/history","analysis":"/api/acts/ad-sf340-102-fuel-quantity-indication-system-modification-3163/analysis","conflicts":"/api/acts/ad-sf340-102-fuel-quantity-indication-system-modification-3163/conflicts","importantCases":"/api/acts/ad-sf340-102-fuel-quantity-indication-system-modification-3163/important-cases","documents":"/api/acts/ad-sf340-102-fuel-quantity-indication-system-modification-3163/documents"}}