COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gates Learjet 24 & 25 Series Aeroplanes AD/LEARJET/30 Amdt 2 Flap System and Flap Sector Mounting Brackets 1/87 Applicability: All model Learjet with S/Nos. listed in requirement documents. Requirement: Modify in accordance with Gates Learjet SB AMK 86-4. Compliance: Within 100 hours time in service or at the next inspection for Maintenance Release issue after 31 January 1987, whichever is later. Background: This Directive was originally issued due to cracking in the flap sector mounting brackets. This amendment replaces the aluminium brackets with steel items and terminates any further requirement.