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/TB10/22 Amdt 1 Front Seats 13/94 Applicability: Model TB9 and TB10 aircraft front seats with a tilting back-rest, installed from February 1991 on aircraft up to serial number 1479; except aircraft serial numbers 1192, 1193, 1308, 1426 through 1433, 1448, 1461, 1462, 1464 through 1469, 1471, and 1473 through 1477. Requirement: Action in accordance with Socata TB Service Bulletin 10-075-25 Amendment 1. Note: DGAC AD 94-114(A)R1 refers. Compliance: Unless already accomplished, within 50 hours time in service after 8 December 1994, or at the next inspection for maintenance release issue, whichever occurs first. Background: The DGAC requires reinforcement of the front seat structure. Amendment 1 is issued to reflect an amendment of the manufacturer's bulletin which clarifies applicability and weld filler material.