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31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

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<strong>CIVIL</strong> <strong>AVIATION</strong> <strong>DEPARTMENT</strong><strong>HONG</strong> <strong>KONG</strong>, CHINAAirworthiness Notice1 IntroductionTHIS NOTICE GIVES DETAILS OF A MANDATORY ACTIONFUEL TANK SAFETY REVIEWNo. 55Issue 230 September 2003In recent years the aviation industry has experienced a number of incidents oraccidents involving fuel tank explosions. This experience suggests that on someaircraft types, the fuel system installation does not provide as high a level ofprotection against explosion as had been expected. The purpose of thisAirworthiness Notice is to require a safety review based on JAR 25.1309 practices,and taking into consideration in-service experience, be used to identify the need forany modification action to correct unsafe conditions, revisions to MaintenanceRequirements and improved maintenance practices required to maintain a satisfactorylevel of safety.The FAA has issued a set of new rules related to fuel tank safety including SFAR 88and amendments to 14 CFR Parts 21, 25, 91, 121, 125, and 129 that require fuel tanksystem design reviews, associated modification reviews and improved maintenanceprocedures and practices.The JAA have requested the National Aviation Authorities to mandate that holders ofType Certificates (TC) and major modification approvals directly related to the fuelsystem installation undertake similar safety reviews, in accordance with JAA InterimPolicy INT/POL/25/12 (available on internet viahttp:/www.jaa.nl/certification/fuel_tank_safety/fuel_tank_frame.html under "D -Harmonised JAA-FAA Policy.pdf"). The initial JAA recommendation letter wasrevised and re-issued on <strong>31</strong> January 2003 in order to harmonise JAA and FAA policy.This amended Airworthiness Notice reflects the changes recommended by JAAincluding the newly harmonised elements. Where identified as necessary by thissafety review the introduction of modifications and improved maintenance practiceswill be mandated.The Director-General fully adopts these recommendations. Operators, TC holders,approved design organisations and modification approval holders will all need tocomply with the contents of this Airworthiness Notice as appropriate.AN-55 P.130 September 2003

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