COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes AD/DHC-8/12 Amdt 1 Emergency Lighting 9/91 Applicability: All DHC-8 series aircraft S/No 1 through 179. Requirement: Action IAW Boeing Canada de Havilland SB 8-33-17 Revision B or later revision. Note: Transport Canada AD CF-90-08 refers. Compliance: The compliance date of the previous issue of this Directive was 17 May 1991. This revision is effective from 5 September 1991. Background: In the current configuration the aircraft does not comply with the emergency lighting requirements of FAR 25.812. Transport Canada have advised of their intention to mandate compliance with this SB. Amendment 1 to this AD is issued to correct a typographical error in the Requirement Document reference number.