COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 737 Series Aeroplanes AD/B737/45 Amdt 1 Takeoff Configuration Warning System 12/90 Applicability: All model Boeing 737 series aircraft as listed in Boeing Service Bulletin 737-31-1033 Revision 1. Requirement: Modify the logic which enables Takeoff Configuration Warning Systems (TOCWS) in accordance with Boeing Service Bulletin 737-31-1033 Revision 1 or later revision. Compliance: Prior to 6 September 1992. Background: Compliance with this AD is required in order to prevent takeoff configuration warning system nuisance warnings when taxi operations are conducted with the flaps intentionally retracted. Amendment 1 to this AD is issued to clarify the applicability.