COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pilatus Britten-Norman BN-2 Series Aeroplanes AD/BN-2/19 Engine Mounting Bracket Jo-Bolts - Inspection NK and Modification Applicability: All models which have exceeded 1000 hours total time in service not incorporating Modification NB/M/455. Requirement: 1. Inspect the engine mounting frames for loose jo-bolts in accordance with Britten Norman SB BN-2/SB.44. 2. If on inspection it is found possible to move or partially rotate Jo-Bolts in both brackets on any one engine mounting, Modification NB/M/455 must be carried out before further flight. Compliance: Within 100 hours time in service after 31 March 1971 and there- after as detailed in SB No. BN-2/SB.44.