COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Airbus Industrie A319, A320 and A321 Series Aeroplanes AD/A320/66 Improved Water Ingress Protection for Avionics 90VU and 91VU 5/96 Applicability: All models A320 without Airbus Industrie modifications 21999 or 22119 embodied, or without Airbus Industrie SB A320-24-1054 incorporated. Requirement: Action in accordance with Airbus Industrie SB A320-24-1054. Note: DGAC AD 96-040-076 (B) refers. Compliance: Prior to 28 February 1999. This Directive has effect from 25 April 1996. Background: This Directive is issued to improve the protection in the avionics compartment from accidental spillage of liquids in cabin or galley area.