COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SAAB SF340 Series Aeroplanes AD/SF340/32 Fuel Tank Access Door Area 4/92 Applicability: Model SF340A with serial numbers 004 through 159 inclusive. Model 340B with serial numbers 160 through 299 inclusive. Requirement: Action in accordance with SAAB Scania AB Service Bulletin SAAB 340-57-020. Note: Swedish (LFV) AD 1-052 refers. Compliance: For the inspection, corrosion removal and surface treatment. - prior to 2 October 1992 For installation of the protective plates - prior to 2 April 1993. Background: Field experience has shown that corrosion has developed on the wing upper panel in the fuel tank access door area. The corrosion is caused by moisture and contact between the conductive paint on the fuel access door and wing structure. This may lead to reduction of strength of the wing upper panel and possible fuel leakage. The compliance times required by the LFV is extended by approximately two months.