COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/90 Ground Spoiler Hydraulic Tube Assemblies - Modification Applicability: All models 727 with line numbers 1 to 1612. Document: 1. FAA AD 82-10-03 Amdt. 39-4375; or 2. Boeing SB No. 727-27-202, Rev. 1. Compliance: As per requirement document. 7/82 Background: Three overseas operators have reported inadvertently cross connecting a ground spoiler up-line with a ground spoiler-down line during routine maintenance.