COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes AD/TB10/2 Horizontal Stabilizer Rivets - Inspection and Modification Applicability: All models TB.9 and TB.10 with s/Nos. prior to 172. Document: Rallye TB SB No. 8 GR.55-07. 8/81 Compliance: 1. Initially inspect within 25 hours time in service after 23 June 1981 and thereafter at intervals not exceeding 100 hours time in service until all rivets referenced in SB No. 8 have been replaced. 2. Modify by replacement of rivets in accordance with requirement document within 300 hours time in service after 23 June 1981. Background: Service experience has shown that certain rivets in the horizontal stabilizer are prone to work loose.