COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 737 Series Aeroplanes AD/B737/5 Wing-To-Body Drag Angle 8/85 Applicability: All model 737 aircraft, Line Numbers 1 to 316. Requirement: 1. FAA AD 85-03-06, Amendment 39-4998, up to and including Section C. 2. Boeing SB 737-53-1031 Revision 3. Compliance: As detailed in Requirement Document No 1. Background: There have been numerous reports of cracking in the wing-to-body drag angles. Continued operation with failed angles could lead to progressive cracking of adjacent structure and rapid decompression.