COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 560 (Citation V) Series Aeroplanes AD/CESSNA 560/1 Engine Flow Divider Start Valve Diaphragm 13/92 DM Applicability: Cessna 560 series aircraft fitted with PWC JT15D-5A engines not incorporating Pratt and Whitney Canada Service Bulletin No. 7372. Requirement: 1. Amend the Aircraft Flight Manual to reflect the requirements of Pratt and Whitney Canada Service Information Letter (SIL) No. 7060 Rev.1, Recommendation: Para. 1. 2. Action in accordance with the requirements of Pratt and Whitney Canada Service Bulletin No. 7371. Note: Transport Canada Directive CF-92-19 refers. Compliance: Effective 21 October 1992: 1. Before further flight. 2. Within 50 hours time in service, or before 1 December 1992, whichever occurs first. Background: This Directive has been issued to reflect advice of two uncommanded in-flight engine shut-down events. The events resulted from deterioration of the engine flow divider start valve diaphragm. The Directive requires an amendment to the Aircraft Flight Manual to address a possible in-flight start valve failure event, and a modification of the flow divider to reduce the start valve diaphragm temperature pending the release of a terminating action.