COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Robin Aviation Series Aeroplanes AD/ROBIN/11 Carburettor Inlet Fitting 7/89 Applicability: All models equipped with Lycoming O-235, O-320 or O-360 series engine. Requirement: Action in accordance with Avions Pierre Robin Service Bulletin No 112. Note: DGAC AD 89-052(A) refers. Compliance: By 26 May 1989. Background: The manufacturer requires inspection and immediate replacement of the inlet fitting if leaks are detected. If no leaks are evident fitting must be replaced at next 50 hourly inspection.