COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F27 Series Aeroplanes AD/F27/132 Truss Member/Rib Attachment Bolts 4/92 Applicability: Model F27 Series, if in Pre SB F27/57-25 configuration. Requirement: Action in accordance with Fokker SB F27/57-25 Revision 1. Note: RLD AD 91-110 refers. Compliance: Prior to 1 January 1995. Background: At present the truss-members at designated wing stations are attached with one long bolt at each end. To obtain a better clamping effect this bolt is replaced by two short ones. The new bolts also have a longer service life.