COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Robinson R22 Series Helicopters AD/R22/32 Carburettor Air Box Latches 8/90 Applicability: All R22 series helicopters. Requirement: Unless previously carried out, action in accordance with Robinson SB No 61. Compliance: At next inspection for issue of a Maintenance Release after 31 August 1990 or by 31 December 1990, whichever occurs first. Background: The manufacturer has received several reports of the air box cover opening in flight.