COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes AD/PA-30/5 Amdt 2 Installation of Vne Placard and Stabilator - Modification 8/67 Applicability: Model PA-30 with S/Nos. 853 and 902 to 1253. Requirement: Rebalance the stabilator in accordance with Piper SB No. 229A and placard the airspeed indicator to show a never exceed speed (Vne) of 206 Kts. IAS. Compliance Forthwith.