COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piaggio P166 Series Aeroplanes AD/P166/17 Angle Bar at Fuselage Frame 20 - Inspection and Modification 5/62 Applicability: S/Nos. prior to 404. Document: Piaggio SB P166-16. Compliance: Forthwith.