{"id":"F2007L02379","name":"AD/SF340/103 - Fuel Quantity Indication System - Modification 3162","slug":"ad-sf340-103-fuel-quantity-indication-system-modification-3162","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67749,"registerId":"commonwealth-F2007L02379-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/SF340/103 | Fuel Quantity IndicationSystem - Modification 3162 | 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) electrical wiring by incorporating Modification 3162 in accordance with SAAB Service Bulletin SB-340-28-024 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-340-28-024 dated 26 February 2007 or later revision approved by the EASA. |\n| | Note: EASA AD 2007-0170 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 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 FQIS 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/SF340/103","sectionType":"part","heading":"AD/SF340/103","content":"## AD/SF340/103","sortOrder":1},{"sectionNumber":"Fuel Quantity IndicationSystem - Modific","sectionType":"part","heading":"Fuel Quantity IndicationSystem - Modification 3162","content":"## Fuel Quantity Indication \nSystem - Modification 3162","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","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"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The Directive implements a design‑review recommendation to ensure wiring separation of the FQIS for SF340A/340B aircraft. It does not extend applicability beyond those types nor add obligations beyond following the SAAB Service Bulletin (or later EASA‑approved revisions) and the stated testing and compliance deadlines (Applicability; Requirement 1; Requirement 2; Compliance; Background)."},"complexity_factors":["Technical nature: safety‑critical electrical wiring changes to the Fuel Quantity Indication System (Requirement 1)","Mandatory follow‑up functional testing required before further flight (Requirement 2; Compliance)","Prescriptive compliance timeline: modification within 72 months, testing immediate post‑modification (Compliance)","Reference to external technical document and approvals: SAAB Service Bulletin SB-340-28-024 and later revisions approved by EASA (Requirement 1)","Cross‑jurisdictional regulatory linkage: cites EASA AD 2007-0170 and SFAR 88 design‑review origin (Background; Note)","Limited applicability to specific types (SF340A and 340B) reduces scope but concentrates impact on affected operators (Applicability)","Operational disruption risk: ‘before further flight’ testing may ground aircraft temporarily (Requirement 2; Compliance)","Regulatory discretion in accepting later revisions of the service bulletin resides with EASA (Requirement 1; Note)"],"plain_english_summary":"The Directive requires operators of SAAB SF340A and 340B aeroplanes to rewire the fuel quantity indication system by installing Modification 3162 per SAAB Service Bulletin SB-340-28-024 (or a later EASA‑approved revision) and to perform an operational functional test. The change is presented as the outcome of a safety design review prompted by SFAR 88 on fuel‑tank explosion risks (Background). Owners/operators pay for the work; the modification must be done within 72 months and testing is required before further flight."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It was issued specifically to mandate a single safety modification (Modification 3162) to address fuel tank explosion risks identified through the SFAR 88/JAA regulatory review process. The document does not expand beyond this specific technical fix for the SAAB SF340 series."},"complexity_factors":["Very short document (approximately 300 words of substantive content)","Only 2 substantive requirements with clear sequential ordering","Single defined technical term (FQIS - Fuel Quantity Indication System) explained in context","No nested exceptions or conditional logic beyond simple time-based compliance","Single cross-reference to external document (EASA AD 2007-0170) provided as background only","Clear applicability statement limiting scope to specific aircraft models","Compliance dates are straightforward calendar calculations (72 months from effective date)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of SAAB SF340A and SF340B aircraft to install Modification 3162 to the Fuel Quantity Indication System (FQIS) and complete operational tests before returning the aircraft to service. The wiring change separates FQIS circuits to reduce risk of electrical ignition of fuel vapours. The modification had to be completed within 72 months of the AD (effective 30 Aug 2007)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162","history":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162/history","analysis":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162/analysis","conflicts":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162/conflicts","importantCases":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162/important-cases","documents":"/api/acts/ad-sf340-103-fuel-quantity-indication-system-modification-3162/documents"}}